How to Use Kokuyo's Hakoake | Correct Use and Tips for Unpacking Cutter Mode and Scissors Mode

How to Use Kokuyo's Hakoake | Correct Usage and Tips for Opening Cutter Mode and Scissors Mode

Kokuyo's Hakoake is a portable tool that condenses the 2-way functionality of an opening cutter and scissors into one device. It not only allows you to smoothly open cardboard boxes right after receiving packages from online shopping but also serves as a pair of scissors, which has garnered support from users worldwide. However, first-time users may find themselves wondering, "Which button should I operate and how?" and "How much force is needed?"

When you receive a large package from Amazon or Rakuten, and you're left thinking, "Now, how should I open this?" — that’s when the Hakoake comes into play. Just slide the switch. The blade extends slightly. Lightly touch the blade to the packing tape and pull it towards you. The tape cuts smoothly. Open the box and check the items inside. You can also use the same Hakoake to cut ribbons or delivery slips. All the unpacking work is completed in just a few minutes with one tool — this convenience makes the Hakoake indispensable.

This article will provide a detailed guide on how to use the Hakoake, from the 4 steps of switching to the opening cutter mode to scissors mode, in a format that is easy for foreigners to understand. Not only will you learn the operational steps, but also why the operations are performed, what kind of feel you should have while proceeding, and common beginner mistakes, all structured to serve as a practical guide.

Basic Structure You Should Know Before Using Hakoake

To use the Hakoake correctly, it is essential to first understand the structure of the main unit and the differences between the two modes. By understanding which parts serve what purposes, you will eliminate confusion during operation and be able to use it more smoothly.

In particular, the opening cutter mode and scissors mode are not just "two different ways to use it" but are designed to be optimized for their respective purposes. The limitation of the opening cutter mode, where the blade extends only 1 to 3mm, might seem inconvenient at first glance, but it is actually a creative solution to ensure the highest level of safety by not damaging the products inside the cardboard. On the other hand, the scissors mode is designed for quickly handling paper or lightweight materials right after unpacking. By understanding the differences between these two, you will begin to see the true value of the Hakoake.

Differences Between Opening Cutter Mode and Scissors Mode

The Hakoake can be broadly classified into two ways of use.

**Opening Cutter Mode** is a dedicated mode for cutting the packing tape of cardboard boxes. The design only allows the blade to extend about 1-3mm, making it capable of cutting just the tape without damaging the contents of the box. When receiving a package from online shopping, you can quickly and safely open it just by pulling in this mode.

**Scissors Mode** is the mode you use to operate the tool as scissors by manipulating the sliding switch on the main body. It covers everyday cutting tasks such as opening paper bags or cutting the tape on delivery slips. The great advantage is that you can switch modes with one hand, allowing you to operate it even while holding a package.

Let's confirm the names and roles of each part

To get accustomed to the operation of the Hakoake, let's confirm the names of the main parts. Just by remembering the position and roles of these parts, the operation will be smoother when you actually hold it in your hand.

• Body: The grip part. It has an ergonomically rounded shape that fits comfortably in the hand. The hardness of the grip is just right, and it is made of lightweight plastic. Even when held for long periods, it is not tiring, and the friction when gripping is moderate, making it less likely to slip from your hand.

• Blade tip: The sharp blade stored at the tip. It is designed to extend only about 1 to 3 mm outward when in unpacking cutter mode. This "slight amount of extension" is the main safety design of the Hakoake. The blade material is stainless steel, which can maintain its sharpness for a long time with regular cleaning.

• Slide switch: A lever-like component about 5 cm long on the side. By sliding it back and forth with your thumb, you can switch between unpacking cutter mode and scissors mode. The switch has a small click feel of "click" to ensure it is securely fixed in each mode position.

• Grip section: The loop part where you insert your fingers during scissors mode. It is stored in a folded state at the back of the body and opens with a "pop" when the slide switch is pushed backward. When this grip is open, it functions as scissors by inserting your thumb and index finger (or middle finger). The inside of the grip has a certain spacing, accommodating sizes from children to adults.

By understanding the roles of each part, the subsequent instructions such as "push the slide switch forward" and "insert fingers into the grip" can be understood immediately. Furthermore, by understanding the position and function of the parts, you will naturally see how to deal with malfunctions or issues that may arise.

How to use unpacking cutter mode: Steps to open cardboard without damaging the contents

The biggest feature of the Hakoake is this unpacking cutter mode. Unlike ordinary cutters or scissors, it is designed for the blade extension to be minimal, making the risk of damaging the contents inside the cardboard extremely low, which is a significant advantage. In fact, many Amazon and Rakuten users comfortably open the packages they receive almost every month using just one Hakoake.

By mastering unpacking cutter mode, you can gain the following benefits:

• Safety: The blade only extends 1 to 3 mm, so there is almost no worry about damaging the contents inside.
• Speed: If the blade catches the tape, it will cut quickly.
• You can unwrap it faster than regular scissors
• One-handed operation: You can operate it with one hand even while holding the box, which greatly improves work efficiency

By following the four steps below in order, even first-timers can safely and smoothly open a cardboard box.

Step 1: Extend the blade and set to cutter mode

Hold the Hakoake and slide the side slide switch **forward (in the direction of the blade tip)**. When the switch clicks into place, the blade will be extended about 1 to 3 mm from the tip of the main body.

Specific operation method:

1. Grip the Hakoake with your dominant hand, ensuring the side with the visible slide switch faces you
2. Place your thumb on top of the slide switch and slowly push it in the direction of the blade tip (usually down or towards the tip)
3. The switch will slide forward about 1 to 2 cm
4. When you hear a clear clicking sound and feel the switch catch, the blade is extended

How much force is needed:

• The force to push the switch is light. There is no need to push hard against it
• The required force is enough to press the click mechanism of a pen
• The image of “pushing lightly” is appropriate

How to check if the blade is extended correctly:

• Check that the switch has moved fully forward
• Look directly at the blade tip to see if a slight portion of the blade is visible (it should extend about the thickness of a fingernail)
• Gently angle the Hakoake against a white sheet of paper to see if the blade is present

Common mistakes beginners make:

• If the switch is stuck in a halfway position, please push it all the way back again
• If your finger position is off and the switch isn’t moving, check the orientation of the switch
• If it’s not moving smoothly, check for dust or debris stuck in the switch and wipe it clean gently

Point: The most important thing in Step 1 is “not to apply force.” The Hakoake is designed delicately, so there is no need to apply strong pressure to the switch. Rather, operating it lightly and slowly will allow you to use it for a long time.

Step 2: Place the blade against the tape of the cardboard

With the blade extended, bring the Hakoake close to the cardboard sealing tape (such as cellophane tape or cloth tape) and lightly place the blade tip on top of the tape. This step is the most crucial as “preparing to pull.” If the blade placement is incorrect, the tape may not cut and instead curl up.

Angle Adjustment of the Box Cutter:

• When you hold the box cutter at a 45-degree angle, the blade tends to catch on the tape more easily.
• This 45 degrees means the "tip of the box cutter is at an angle to the cardboard surface."
• If the blade hits vertically, the force applied will be pushing rather than cutting, making the blade more likely to slip.

Positioning the Blade Tip:

• Adjust the position so that the blade tip hits the center of the tape.
• If you hit the edge of the tape or slightly outside of the tape, the blade may easily come off the tape when you pull.
• Especially with cellophane tape (transparent tape), the blade is hard to see, so rely on the sense of your fingers for positioning.

Where to Start:

• Starting from the corner of the cardboard makes for a stable and smooth pull direction.
• Starting from the corner allows the "pull" motion to flow more naturally than starting from the middle of a side.
• If tape is applied to multiple sides, start the first piece by pulling from the corner, then proceed to the next side.

Box Type: Tips for Positioning the Blade

With different types of cardboard boxes, the technique for positioning the blade varies slightly:

• Thin cardboard boxes (commonly used for online shopping and delivery): Since the tape is relatively flat, lightly applying the blade at a 45-degree angle is sufficient to catch.

• Thick double-walled cardboard boxes: The tape may be somewhat wavy. In this case, adjust the blade to hit the higher parts of the tape.

• When multiple layers of tape overlap: Lower the angle slightly and position the blade while being aware of the "layers" of tape. Trying to push the blade too deep will cause it to hit the cardboard surface underneath.

Important Note: Do not press the blade down hard. The box cutter is designed to cut tape with pulling force, not pushing force. A light touch to the tape with the blade is sufficient. The pressure should be enough to feel the "weight of the blade" against the tape.

Feeling of "successful contact":

• A slightly heavy sensation that the blade is "catching on the tape".
• A feeling that the tape is lightly pulled and subtly drawn toward the blade.
• You may also hear a slight "scraping" sound at the moment the blade makes contact.

Step 3: Pull Towards You to Cut the Tape

With the blade tip against the tape, slowly pull towards **your direction (toward you)**. At this point, when the blade catches the tape, it will cut smoothly with a pleasant sensation.

Details of the Pulling Action:

• Speed: Do not rush; pull slowly at a steady pace.
• As a guideline, a speed of about 10 to 15 cm per second is ideal.
• How to apply force: It's important to maintain a sense of cutting just using the weight of the box cutter and the pulling motion, without applying too much force. Instead of 'pulling' the box cutter with your hand, imagine using the weight of the box cutter itself and waiting for the blade to catch on the tape.
• Wrist angle: Keep your wrist fixed and pull slowly using your entire arm from the elbow. Pulling with just your wrist can make your technique awkward, causing the blade to easily slip off the tape.
• Fixing the cardboard box: While pulling the box cutter with one hand, lightly hold down the cardboard with the other hand for a more stable cutting action.

Feeling when it's being cut well:

• Auditory: A quiet 'shoo' or 'slip' sound is heard. If a sharp crackling sound occurs, it's often because the blade is catching too much, or the tape is layered too thickly.
• Tactile: When the blade securely grabs the tape, the 'resistance' felt through the box cutter is pleasant, and it pulls relatively lightly. Conversely, if the blade is slipping over the tape, there will be no resistance, and the box cutter will 'slide' too easily.
• Visual: The tape splits into two straight lines, and the cut remains almost straight. If the pulling method is shaky or the blade contact is poor, the tape may end up being cut in a zigzag pattern.

Steps to cut the tape on each side:

1. Start pulling the first side from the corner, cutting through to the opposite corner.
2. Before moving to the next side, lift the blade away from the tape and place it back on the corner of the new side.
3. Using the same method, cut the tape on all four sides in order.
4. If the tape is crossed (on both the top and sides), it’s more efficient to cut the top completely before moving on to the sides.

Handling different failure patterns:

• Tape won't cut and curls up: The blade may not be catching the tape. Adjust the angle of the blade to 45 degrees and ensure it hits the center of the tape before trying to pull again.
• Blade slips and doesn't score the tape: The blade angle may be too shallow, or the blade might be hitting the edge of the tape. Slide the blade a bit deeper to hit the center of the tape.
• Blade isn't advancing even though you're pulling: The blade might be snagging on the blade holder (the part of the body that supports the blade), or it may be a dull, old blade. Try a new box cutter or, if it's been heavily used, consider replacing the blade.

Why it doesn't damage the contents: The blade exposure of the box cutter is designed to be very small, at 1 to 3 mm. Since the thickness of cardboard is about 3 to 5 mm, the blade usually doesn’t penetrate through the cardboard to reach the item inside.

Especially considering the layered structure of cardboard (with wavy paper between the inner and outer paper layers), the blade only catches the outer layer or the packing tape, so it does not reach the inside of the cardboard. This is the main reason why Hakoake is highly regarded as a "safe and reliable unpacking tool."

Step 4: Store the blade after use

Once you have finished opening the cardboard, return the slide switch back to its original position **towards the rear (grip side)**. Ensuring that the blade is fully retracted inside the body is the top priority for safety.

Steps to store the blade:

1. Hold the Hakoake in your dominant hand so that the slide switch is visible
2. Using your thumb or a finger from your other hand, slowly push the slide switch backward (toward the grip)
3. When you feel the switch click into place, it means the switch has fully moved to the rear position
4. Visually confirm that the blade is completely hidden inside the body by looking directly at the blade tip (this is extremely important)

Points to check when storing:

• Confirm that the slide switch is completely in the rear position (a half-done position is dangerous)
• If you feel the blade tip clicking into the body, it means it has been stored correctly
• Do not put it in your pocket or bag with the blade tip exposed
• Immediately after use, the blade tip is sharp, so make it a habit to always store it before setting it down

Precautions for long-term storage:

• Before storing, wipe the Hakoake lightly to remove tape residue and dirt
• Store it in a dedicated case or a stationery case when it is completely dry
• Avoid high-temperature and high-humidity environments; storing at room temperature helps maintain the functionality of the slide switch longer
• Once a month, check if the slide switch moves smoothly and ensure there are no obstructions

Three tips to avoid mistakes in unpacking cutter mode

We will introduce common mistakes made by beginners when using Hakoake for the first time and their countermeasures. By simply being aware of these mistakes, you will be able to use Hakoake effectively.

1. Applying too much force

A common mistake for beginners is to press the Hakoake against the cardboard too hard.

• NG Behavior: Pulling while pushing the blade in as if using a regular cutter with a firm grip on the Hakoake
• What happens: The blade digs into the surface of the cardboard, the tape doesn't cut, and you hear a "grating" noise as the blade gets stuck. Additionally, the outer layer of the cardboard gets damaged, making it look unsightly.
• Correct Approach: Just pulling with light force is sufficient. Aim for a level where the blade can feel the weight of the tape with a light touch of your fingers. There is no need to push in like a cutter at all.

2. The angle of the blade becomes too shallow

There are many failures when the blade is almost horizontal to the tape.

• NG Behavior: Laying the box cutter too flat so that the blade hits the tape at a shallow angle rather than vertically (e.g., an angle of less than 30 degrees)
• What Happens: The blade tends to slide over the tape without catching, and even when pulled, it "glides" and does not cut the tape. The tape rolls up and is not separated at all.
• Correct Answer: Be aware of an angle of about 45 degrees. At this angle, the blade will catch on the tape securely and cut smoothly. Adjust the angle of your hand so that the blade hits the tape "slightly diagonally."

3. Cutting Parts Other Than the Tape

If you pull carelessly on the surface of the cardboard, you risk damaging areas other than the tape.

• NG Behavior: Pulling the box cutter without confirming the tape, thinking "This should be roughly around here."
• What Happens: There is a risk of cutting the outer layer of the cardboard itself (especially the printed logo or design areas) or damaging the products inside (the packaging of the paper box).
• Correct Answer: Always place the blade on the tape before you start pulling. Touch the tape with your fingers to confirm its position, gently place the blade on it, and then pull slowly. If multiple layers of tape are overlapping, cut the top tape first, and then cut the ones underneath.

Application: How to Handle Multiple Types of Tape

• Cellophane Tape (Transparent Tape): It is thin and transparent, making it hard to see, but relatively soft, so it can be cut with a light force. Due to its low visibility, it's important to rely on the sensation of your fingers to position the blade.

• Cloth Tape (Gaffer Tape): It is thick and tends to catch easily, so it is okay to pull with a slightly stronger force than with cellophane tape. However, if you pull too hard, the blade may dig into the surface of the cardboard, so caution is needed.

• Double Overlapping Tape: After completely cutting the top tape, pull on the second one. If you try to cut both at once, the blade may catch, resulting in poor cutting performance.

• Old Tape (Tape with Reduced Adhesiveness): Tape that has lost its stickiness tends to cause the blade to slip. In this case, place the blade slightly deeper to feel its touch on the surface of the cardboard underneath the tape for easier cutting.

The Most Important Sense of "Lightness" in Using a Box Cutter

The most important point in mastering the use of a box cutter is the sense of "lightness." By simply understanding this, you can quickly get closer to being an advanced user from a beginner:

• Basic principles when applying force: The force to grip the box cutter should be "about the same as holding a pen," and the pulling force should be "just enough to feel the weight of the tape." There is no need to apply stronger force than this.

• Advantages of pulling lightly: By pulling lightly, the blade can catch on the tape more easily, allowing for a quicker cut. Additionally, since no extra force is applied, the risk of damaging the cardboard itself or its contents is significantly reduced.

• Aiming for the 'smooth' sensation: Those who skillfully use a box cutter like a professional value the sensation of the tape being cut smoothly. Once you can feel this sensation, you too are a user of the box cutter.

Tips for unpacking different shapes of cardboard boxes

Different types of cardboard boxes require a bit of ingenuity. The cardboard boxes commonly sent through mail order can be broadly categorized into three types:

1. Standard delivery cardboard (most common)

• Features: The tape is neatly applied and nearly flat. This is the typical box sent from major online retailers (like Amazon, Rakuten, etc.).
• Unpacking tips: You can unpack it without issues using the usual method (placing the blade at a 45-degree angle against the tape and pulling). There’s nothing particularly difficult since the tape is easy to see.
• Beginner friendly: Since this is the simplest shape, it's recommended for those trying the box cutter for the first time to practice with this type of box.

2. Thick double-walled cardboard (for heavy items)

• Features: The tape may be thick and may have ripples. It often contains heavy items such as furniture or heavy equipment.
• Unpacking tips: If the tape is rippling, applying the blade to the "high points of the wave" allows it to catch smoothly. It's okay to use a little more force than with a standard box.
• Notes: Since there are often multiple layers of tape, make sure to fully cut the top layer before working on the second layer.

3. Boxes with multiple layers of tape (security-focused)

• Features: The tape may be overlapped 3 to 4 times. This is especially common for valuables or items that can be returned.
• Unpacking tips: After completely cutting the top tape, reposition the blade for the next tape. Trying to cut multiple layers at once can result in the blade getting stuck on the tape.
• Force adjustment: If the tape is layered, it's okay to pull a bit harder than with a standard box.

Methods for Dealing with Cardboard Deterioration

• Wet or Damp Cardboard: If the tape is wet, the blade is more likely to catch. In that case, try adjusting the angle of the blade to a shallower position and wipe the surface of the tape while pulling it to make cutting easier.

• Old Cardboard or Dented Boxes: When the surface is dented, slightly tilt the position where you place the blade, making contact with the 'peak' part of the cardboard, which can make it easier to catch.

If you remember these tips, you will be able to handle various types of cardboard.

How to Switch to Scissors Mode and Usage

After opening the cardboard in unpacking cutter mode, being able to use it directly as scissors is a major appeal of Hakoake. You can switch modes with one hand, allowing you to continue working while organizing packages. Here, we will explain the steps to switch to scissors mode and how to use it in daily life.

Steps for Mode Switching with One Hand

Switching to scissors mode is done in the following steps. The comfort of this mode switch is one of the reasons why Hakoake is loved by many users.

Step 1: Grip the Hakoake with your dominant hand. The blade tip facing upwards is an easy position to operate. The grip is currently in a 'closed' state (folded state) and is not yet in a form that can be used as scissors.

Step 2: Press the slide switch backward (toward the grip) with your thumb. As the switch moves slowly to the back end, the grip part at the back of the main body will begin to open.

Confirm the sensation when the grip opens:

• When pushing the slide switch, you will hear a distinct click sound (this is the signal that the mode switch is complete).
• The grip part will open lightly with a 'pata' sound, not a 'batan' sound (it opens softly, not forcefully).
• When you finish pressing the switch, the grip part will be completely opened to 90 degrees.
• If the grip opening is incomplete, please press the switch firmly again to the back end.

Step 3: Insert your thumb and index finger (or middle finger) into the opened grip ring. At this time:

• Insert your thumb into the upper part of the grip and either your index or middle finger into the lower part of the grip.
• If the grip ring is small, please adjust the spacing with your thumb and index finger.
• You do not need to grip the handle tightly; just passing your fingers through the ring is sufficient. This will put it in a state where it can be used as scissors

Method to confirm: "It has switched to scissors mode correctly":

• The grip ring is securely fixed to your hand
• When opening and closing the scissors, your fingers do not get caught in the ring and move smoothly
• The slide switch is fully moved back, and the blade is stored inside the main unit

Step 4: To return to cutter mode, remove your fingers from the grip and push the slide switch forward.

Scissors mode ←→ Cutter mode: Tips for quick switching

• When removing your fingers from the grip, there is no need to force it out. It will come out naturally
• When pushing the slide switch, you can operate it with just your thumb, so it's okay to keep holding the box with other fingers
• If you continue working while organizing packages, this smooth switching is a significant advantage

Points for one-handed operation: The slide switch is located where it can be operated with just your thumb. Even when holding packages, it is key that you can complete the switching with your dominant hand only. Practicing on a table until you get used to it will help you learn smoothly. In particular, checking that your fingers are not caught in the grip before pressing the switch will enable smooth switching.

What can be cut in scissors mode and things to be cautious about

The scissors mode of the Hakoake is designed as portable scissors. It cannot cut just anything, so make sure to check suitable materials and those that require caution.

Easy-to-cut materials

• Paper (wrapping paper, slips, envelopes): It can cut thin to moderately thick paper without any issues
• Thin vinyl tape and cellophane tape: Especially cellophane tape is very easy to cut and is perfect for unpacking work
• Shipping cushioning materials (thin air packing, etc.): It is also useful when cutting bubble wrap
• Food bags and packages (thin ones): Thin bags like snack bags and candy wrappers are fine
• Ribbons and strings: Useful for unwrapping gifts

Materials to be cautious about and uses to avoid

• Cardboard and cardboard itself (cutting with scissors can easily dull the blade): Cutting the cardboard itself can catch the blade in the corrugated paper, risking chipping. Please use the unpacking cutter mode for unpacking.

• Fabric and clothing (there is a possibility of fibers getting tangled): When cutting fabric, fibers can get tangled in the grip of the scissors and affect operation. Especially avoid materials that fray, such as sweaters and shirts.

• Wires and wire types (risk of chipping the blade): Cutting delivery-binding wires or wire attached to craft boxes can cause the blade to chip immediately.

  Avoid at all costs

• Multiple sheets of paper stacked together (forcing to cut can strain the blade): Attempting to cut more than 10 sheets of paper or flyers at once can cause the blade to snag and interfere with scissor operation.

• Hard food packaging (such as meat packs and aluminum containers): Please avoid vacuum-packed meat and aluminum food packaging as they can damage the blade. If you want to cut food, limit yourself to thin bags of snacks or soft food packaging.

• Hard plastic materials (such as CD cases and plastic cases): Cutting hard plastic can cause the blade to slip easily, increasing the risk of injury to your hands.

The Hakoake is designed for unboxing and everyday small cutting tasks, and it cannot replace large scissors or industrial cutters. By using it appropriately for its intended purpose, it can be used for a long time. If in doubt, use "thin and soft material" as a guideline.

Tips for Effectively Utilizing Scissors Mode in Daily Life

Scissors mode is particularly convenient for a series of tasks immediately after receiving a package from online shopping. After opening a cardboard box in cutter mode, you can switch directly to scissors mode to continue the following tasks.

Examples of Use Right After Unboxing

• Cutting invoices and receipts: Cut necessary documents for returns or exchanges to an appropriate size. In particular, it is useful for peeling off the shipping invoice stuck to the cardboard box and cutting only the necessary parts.

• Handling tape: Before discarding cardboard, cut the packing tape short to make it easier to separate. This makes sorting easier when recycling.

• Organizing packing materials: Cut air packing and thin plastic bags into smaller pieces to tidy up the trash. This is especially handy for compacting bulky packing materials.

• Assistance in gift wrapping: Cut ribbons and seals for wrapping gifts. If you want to wrap a newly received item immediately after unboxing, you can do it all with one Hakoake.

Ways to Utilize in Everyday Scenes

• Use in an office environment: By not only keeping it on your desk but also carrying it in a pouch or bag, you can handle small cutting tasks while out and about.

  In particular, it excels when cutting meeting materials or processing invoices.

• Mobile during travel: Hakoake is lightweight and easy to fit in a pouch, making it ideal for fine cutting tasks during travel (such as cutting tags and opening packages).

• Replacement for scissors in emergencies: Keeping it in your bag allows you to handle situations where you need to "quickly cut something" when you're in a hurry.

Specific precautions for scissors mode during long-term use

• Cleaning the grip area: If you frequently use scissors mode, dust and tape adhesive can easily accumulate on the grip. It is recommended to wipe the inside of the grip with a cloth at least once a month to keep it clean.

• Using the grip according to finger size: If the grip is small, there is a method to operate the scissors using the side of your nails. Attempting to force your fingers in could damage the grip area.

• Adjusting the amount of force applied: If you try to cut thick materials in scissors mode and apply excessive force, it can put a strain on the grip area. If it’s difficult to cut, using a different tool is recommended.

Safety points and precautions during use

Hakoake is a tool developed with a focus on safety design; however, since it is a tool that uses blades, it is important to follow the correct usage and storage methods. Especially for households with children or those using Hakoake for the first time, it is advisable to check the following safety points in advance.

The mechanism of the safety design that stores the blade inside

The core of Hakoake’s safety design is that the blade is completely stored inside the main unit when not in use. As long as the slide switch is in the rear (storage) position, the blade tip does not protrude.

This mechanism provides the following benefits:

• Even when placed inside a bag or pouch, it will not damage other items.
• The risk of direct contact with the blade is low, even if touched accidentally.
• It has high safety when not in use.

Additionally, even when in unpacking cutter mode, the blade extension is limited to 1-3mm, significantly reducing the risk of cutting deeply into materials other than tape (hands, clothes, contents inside the package) compared to a regular cutter. This is one reason why it is recognized worldwide as a “safe-to-use unpacking tool” among online shoppers.

Three safety checks to confirm before use

Before starting to use Hakoake, make it a habit to check the following three points. This check is especially important when using Hakoake again after not using it for a while or when allowing children to use it.

1. Check the condition of the blade: If the blade tip is chipped, significantly dirty, or rusted, please refrain from use. A decrease in sharpness can lead to tape not cutting properly, requiring you to pull excessively, which can be dangerous.

If the blade is dirty, please wipe it lightly with a cloth.

2. Check the operation of the slide switch: Confirm whether the switch moves smoothly and can be securely fixed in both unpacking cutter mode and scissors mode. Please do not use it if there are any snags or abnormalities. Especially after long-term storage, it is recommended to check if the switch moves smoothly.

3. Check the correct holding method: Ensure you grip the handle firmly and that your hands or body are not in the direction of the blade (the pulling direction) before you start using it. It is particularly important to check that the fingers of the opposite hand are not in the direction of the blade when pulling cardboard.

Additional: Uses to Avoid

The Hakoake has excellent safety design, but please avoid the following uses at all costs:

• Testing the blade with your fingernail: Please avoid testing the blade with your fingernail out of curiosity about whether it will cut. This could lead to unexpected injuries.

• Using while another person is in the pulling direction: When pulling the Hakoake, please confirm that no one is in that direction before using it. Care is particularly needed when children are nearby.

• Dropping with the blade extended: Dropping the Hakoake with the blade extended can cause the blade to stab into cardboard or the floor. Always retract the blade after use.

• Forceful cutting in scissors mode: Trying to cut hard materials forcefully in scissors mode may cause excessive pressure from your fingers, leading to injuries. If it won't cut, please use another tool.

• Children using without adult supervision: The Hakoake has a safety design, but it is a tool that involves handling a blade. If it is being used by a child, please ensure that an adult is supervising at all times.

Tips for Safely Storing and Carrying the Hakoake

Here are some methods for storing and carrying the Hakoake safely and ensuring long-lasting use.

• Always return the slide switch to the storage position after use: The priority is not to leave the blade extended. The tip of the blade is extremely sharp immediately after use, so care is especially required.

• Store it in a dedicated pouch or stationery case: Mixing it with other stationery in a drawer can pose a risk of touching the blade when taking it out. If possible, it is recommended to prepare a small pouch specifically for the Hakoake and store it separately from other stationery.

• Store it out of reach of children: Although the Hakoake has a safety design, it is recommended to store it in a high place, such as a shelf, to eliminate the risk of children accidentally operating it.

In particular, because the slide switch can be easily operated by children, be sure to keep it in a place that is out of children's reach.

Easy Troubleshooting When You Are in Trouble

When you actually use it, small issues may arise. Below are common problems and their solutions.

Problem: The slide switch does not move or gets stuck

• Cause: There may be dirt or adhesive tape stuck around the switch.
• Solution: Gently wipe around the switch with a dry cloth. If that does not improve it, soak a cotton swab in ethanol (or use a wet tissue) and gently wipe the gaps of the switch.

Problem: The blade does not extend in unpacking cutter mode

• Cause 1: The switch may not be fully moved forward.

• Solution 1: Push the switch slowly again all the way to the front edge. Push until you hear a "click" sound.

• Cause 2: The blade may be stuck inside the unit (especially with old Hakoake or those not used for a long time).

• Solution 2: Tilt the Hakoake and tap it lightly to encourage the blade to move. If it still doesn't move, we recommend purchasing a new Hakoake.

Problem: The tape does not cut at all or slips

• Cause 1: The blade is hitting the tape at a shallow angle.

• Solution 1: Adjust the blade to meet at a 45-degree angle and ensure the blade hits the center of the tape.

• Cause 2: The sharpness of the blade has decreased (after multiple uses).

• Solution 2: We recommend preparing a new Hakoake.

  Having multiple Hakoake as consumables allows you to quickly replace them when the sharpness decreases.

Problem: The grip in scissors mode won't open.

• Cause: The slide switch may not be fully moved back.
• Solution: Press the switch slowly all the way to the back again. Push it until you can feel the grip open with a "pat" sound.

Problem: When cutting paper with scissors, fibers got stuck.

• Cause: Fibers got tangled in the grip area because you cut materials with fibrous textures, such as fabric.
• Solution: Use tweezers or a thin stick to carefully pull out the fibers stuck in the grip area. Applying too much force may damage the grip.

Maintenance and Tips for Long-term Storage of Hakoake

Regular maintenance is essential for enjoying Hakoake for a long time. Below are methods to keep Hakoake in the best condition.

Daily Care Methods

• Cleaning After Use: Immediately after use, lightly wipe the entire Hakoake with a dry cloth. It is especially important to wipe off any tape residue around the blade tip and the slide switch area.

• Blade Tip Maintenance: If stubborn adhesive is stuck to the blade tip, soak a cotton swab in ethanol (or use alcohol disinfectant wipes) and gently wipe it off. Applying too much pressure may chip the blade.

• Regular Cleaning of the Slide Switch: It is recommended to wipe the area around the slide switch with a dry cloth once a month to keep it sliding smoothly.

Points to Note for Long-term Storage

• Store in a Dry Environment: In high humidity environments, the slide switch may become difficult to operate. Always store in a dry place.

• Avoid Direct Sunlight: Leaving it in direct sunlight for extended periods may degrade the plastic of the grip area.

• Proper Temperature Management: Do not place Hakoake in extremely high-temperature areas, such as in a car or near the kitchen.

The plastic grip may deform

Regarding blade replacement

• Timing for replacement: If, after multiple uses in unpacking cutter mode, the sharpness of the blade has noticeably diminished or if the blade is chipped, it is recommended to replace it with a new Hakoake.

• Keep multiple blades on hand: If you frequently use Hakoake at the office or home, having 2 to 3 on hand allows for immediate replacement when the sharpness declines.

• Disposal of old Hakoake: When disposing of a Hakoake that can no longer be used, please handle it carefully to ensure the blade does not mix with other non-burnable waste. It is important to follow municipal instructions for proper separation and disposal.

About the lifespan of Hakoake

• Typical service life: With normal use (5 to 10 unboxings per month), a single Hakoake lasts about 1 to 2 years.

• For heavy users: In an environment where multiple cardboard boxes are opened daily, it may be advisable to consider replacing the blade every 3 to 6 months.

• Value of usage feel: If you notice, "Recently, the blade has not been catching tape as easily," that is a sign for replacement. For safety and ease of use, please consider replacing it with a new Hakoake when sharpness declines.

Correct Holding and Body Usage for Long-term Comfortable Use

When using Hakoake, not only the method of operation but also the correct holding posture and the balance of the entire body are important. Here are some tips for efficiently advancing the unpacking process like a pro.

Correct Holding Posture in Unpacking Cutter Mode

Hand position:

• Grip the Hakoake firmly with your dominant hand. Hold the entire grip part, ensuring that all fingers contact the surface.
• For stability, the thumb should be on the side of the Hakoake (opposite the slide switch), and the remaining four fingers should wrap underneath.
• A grip strength of "just enough to hold a pen" is sufficient. Gripping too tightly can make your hands tired when pulling.

Usage of elbows and arms:

• Keep your elbows close to your body and pull using your entire arm.
• If you pull only with your wrist, it becomes awkward and it's difficult to control the force.
• If you consciously keep your elbow and wrist in a straight line, you can pull in a stable manner.

Body posture:

• Stand in front of the cardboard box and lower your waist slightly (there's no need to bend too much).
• It's important to relax your shoulders and pull with your arms in a relaxed state. If your shoulders are tense, it's likely to cause hand shake.

Using the other hand:

• When pulling with the box cutter, lightly press down on the cardboard box with the other hand.
• If you press too hard, the tape will get pulled by the box and become difficult to cut, so lightly resting your hand is sufficient.
• When checking the position of the tape, use this hand to trace the tape with your fingers and recognize where to place the blade.

Correct grip in scissors mode

How to insert fingers into the grip:

• Insert your thumb and index finger (or middle finger) into the grip.
• Adjust the depth so that your fingers fit comfortably and avoid gripping the handle too tightly.
• When opening the scissors, move them to widen the space between your thumb and index finger.

Notes during cutting:

• When cutting paper with scissors, use the middle to tip of the blade rather than the base (the part close to the grip) for easier cutting.
• Instead of opening and closing widely in one motion, repeat small openings and closings to cut even thicker materials relatively easily.

Tips to avoid fatigue during extended use

Regular breaks:

• When opening multiple cardboard boxes, it's recommended to stop and rest your hands after opening a few.
• Repeating the same motion can easily tire out your wrists and fingers.

Regularly check the condition of the blade:

• After opening 3 to 4 cardboard boxes, check the condition of the blade.
• If tape glue is on the blade, wiping it with a cloth will make the next unpacking smoother.

Whole body relaxation:

• When using the box cutter, be careful not to tense up your entire body.
• By moderately relaxing the strength in your shoulders, arms, and wrists, you can reduce fatigue even during long working hours.

Summary: Use the 2-way functionality of the Box Cutter for a more comfortable unpacking

Let's review how to use the Box Cutter. The unpacking cutter mode consists of four steps: "Slide the switch forward → Place the blade against the tape → Pull towards you → Return the switch back." Switching to scissors mode can also be done with one-handed operation using just the slide switch. Thanks to its safety design, where the blade is stored inside, it's safe for everyday carry.

At first, it may take some getting used to, but after using it 2 to 3 times, you will quickly grasp the feel of it. Please try to incorporate it into your daily life as a reliable tool that shines every time you receive a package from online shopping.

Quick Reference for Beginners: Hakoake Usage Cheat Sheet

For those who want to quickly check how to use it, here are the summarized points:

Unboxing Cutter Mode

• Switch forward → Blade extends 1 to 3 mm
• Place the blade at a 45-degree angle against the tape → Just lightly touch it
• Slowly pull towards yourself → Speed should be about 10 to 15 cm per second
• Switch backward → Blade retracts

Switching to Scissors Mode

• Switch backward → Grip opens
• Insert fingers into the grip → Scissors are complete

Safety Check Items

• Before use: Check the condition of the blade, check the operation of the switch
• During use: Ensure there are no objects or hands in the direction of the blade
• After use: Always retract the blade and place it in the pouch

Use a different tool without hesitation in the following situations

• When you want to cut hard or thick materials
• When the blade is chipped
• When too much force is applied and the blade is slipping off the tape

If you want to know more details, please also see "A Comprehensive Guide to Kokuyo's Hakoake | Choosing Types, Tips for Use, and How to Purchase from Overseas".