1. Introduction
The KATSU Handmade Japanese Razor Pocket Folding Knife is a high-quality, modern interpretation of the traditional Higonokami design. This manual provides essential information for the safe and effective use, maintenance, and care of your knife.
Key Features:
- Compact Design: 4.5-inch closed length, extending to a total length of 7.5 inches when open.
- Traditional Opening: Features a Japanese-style thumb lever for one-hand opening.
- Quality Construction: A well-built and aesthetically pleasing modern Higonokami.

Image: The KATSU Japanese Razor Pocket Folding Knife displayed in its fully open position, showcasing the blade and handle design.
2. Safety Warnings
WARNING: Knives are sharp tools and can cause serious injury if not handled properly. Always exercise extreme caution.
- Keep out of reach of children.
- Always cut away from your body.
- Ensure the blade is fully open and locked (if applicable) before use.
- Close the knife securely when not in use.
- Do not use the knife for tasks it was not designed for.
- Inspect the knife for damage before each use. Do not use if damaged.
3. Setup and Opening
This knife features a traditional Japanese-style thumb lever for deployment. To open the knife:
- Hold the knife firmly in one hand with the thumb lever facing upwards.
- Place your thumb on the thumb lever (also known as the 'chikiri').
- Apply gentle pressure and push the lever to pivot the blade out of the handle until it is fully extended.
- Ensure the blade is stable before use. Note: This traditional design typically relies on friction and hand pressure during use, rather than a mechanical lock.
To close the knife, carefully push the blade back into the handle using the thumb lever, ensuring your fingers are clear of the blade path.
Video: A demonstration of the KATSU Japanese Razor Pocket Folding Knife being opened and closed using the traditional thumb lever, followed by a brief display of its cutting capabilities on paper and rope.
4. Operating Instructions
The KATSU Japanese Razor Pocket Folding Knife is designed for various light to medium cutting tasks. Its sharp High Carbon Steel blade is suitable for:
- Opening packages and boxes.
- Cutting rope or cordage.
- General utility tasks in outdoor or everyday settings.
- Crafting and whittling.
Always ensure a stable grip on the wooden handle and apply appropriate pressure for the task. Avoid twisting or prying with the blade, as this can cause damage or injury.

Image: A close-up view of the KATSU Japanese Razor Pocket Folding Knife, highlighting the intricate Damascus pattern on the blade and the textured handle.
Video: A product demonstration video showcasing various features and uses of a KATSU folding knife, including its opening mechanism and cutting performance.
5. Maintenance and Care
Proper maintenance ensures the longevity and performance of your KATSU knife.
- Cleaning: Hand wash only. After each use, especially with food or corrosive materials, clean the blade with mild soap and water. Dry thoroughly immediately to prevent rust.
- Drying: Ensure the knife is completely dry before closing and storing. Moisture can lead to corrosion, particularly on high carbon steel.
- Oiling: Periodically apply a thin layer of food-safe mineral oil to the blade and pivot points to prevent rust and ensure smooth operation.
- Sharpening: Maintain the razor-sharp edge with a suitable sharpening stone or system. Sharpening should be done carefully to preserve the blade's geometry.
- Storage: Store the knife in a dry environment. The included leather sheath provides protection when not in use.

Image: A detailed close-up of the KATSU Japanese Razor Pocket Folding Knife's blade, showing its sharp edge and the subtle pattern on the steel.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | KATSU |
| Model | Japanese Razor Pocket Folding Knife |
| Closed Length | 4.5 Inches |
| Total Length (Open) | 7.5 Inches |
| Blade Material | High Carbon Steel |
| Handle Material | Wood |
| Blade Shape | Straight Back |
| Hand Orientation | Ambidextrous |
| Product Care Instructions | Hand Wash Only |
| Recommended Uses | Bushcrafting, Camping, Carving, Fishing, Hiking, Hunting, Peeling, Skinning, Whittling |
7. Troubleshooting
- Blade is Dull: Sharpen the blade using appropriate sharpening tools and techniques.
- Blade is Stiff to Open/Close: Apply a small amount of lubricating oil to the pivot point. If the issue persists, check for debris and clean thoroughly.
- Rust Spots on Blade: Clean immediately with a rust remover designed for steel, then re-oil. Ensure proper drying and oiling after each use to prevent recurrence.
8. Warranty and Support
For warranty information, product support, or to inquire about replacement parts, please contact KATSU customer service through the retailer where the product was purchased or visit the official KATSU website. Please retain your proof of purchase for warranty claims.