Ichizo (市蔵) is a blade brand from the Banshu region of Japan, with a tradition of quality craftsmanship. This is a Tosa Kurouchi Santoku (土佐黒打ち三徳) — a double-bevel all-purpose kitchen knife in the traditional style of Tosa (present-day Kochi Prefecture), one of Japan's oldest blacksmithing regions. The blade is forged from Aogami (青鋼, Blue Steel) in warikomi construction, and left with its kurouchi (黒打ち, "black forged") finish — the dark, hand-hammered scale straight from the forge, rather than polished to a mirror shine. It is a blade with real character, made for cooks who want to work with a traditional carbon steel edge.
Please Sharpen Before First Use
This knife ships with a factory edge. It will cut as shipped, but it is not brought to its final, full sharpness at the factory — traditional Kurouchi blades like this one are meant to be finished on a whetstone by the person using them. Take some time on a whetstone to bring up your own edge on the Aogami steel, and you will be rewarded with the kind of sharpness this steel is known for.
Technical Specifications
| Brand | Ichizo (市蔵) |
| Type | Tosa Kurouchi Santoku (土佐黒打ち三徳) |
| Blade Length | 150 mm (approx. 5.9") |
| Overall Length | 295 mm (approx. 11.6") |
| Handle Length | 122 mm (approx. 4.8") |
| Weight | 90 g (approx. 3.2 oz) |
| Blade Thickness | 3 mm |
| Steel | Aogami (青鋼, Blue Steel), warikomi clad |
| Blade Type | Double Bevel |
| Handle Material | Wood |
| Origin | Japan (Tosa / Kochi Prefecture style) |
| Box | Included |
| Condition | New — unused |
Condition Details
New · Unused · Please Check All Photos
Brand new and unused. No chips, no cracks, no bends. Handle firm and secure. Ships with a factory edge, ready to be finished on a whetstone (see note above). Box included.
Care & Maintenance
- Hand Wash Only: Wash with mild soap, rinse thoroughly, and dry immediately after each use. Aogami is a carbon steel and will rust if left wet. Do not soak or use a dishwasher.
- Rust Prevention: Apply a thin coat of food-safe oil (camellia oil or mineral oil) after use and before storage. Darkening and patina on the kurouchi finish over time are normal and part of the blade's character, not defects.
- Storage: Store on a knife rack or magnetic strip. Keep dry and protect the edge.
- Sharpening: Sharpen on a whetstone, maintaining the double-bevel edge angle on both sides. Aogami sharpens readily and takes a very fine, long-lasting edge.
- Cutting Surface: Use a wood or soft plastic board. Avoid glass, stone, or ceramic surfaces, which accelerate edge wear and can cause chipping.
Safety & Use Notice
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01
Intended Use / User Responsibility
This knife is a cutting tool for lawful kitchen use only. You are responsible for safe handling, safe storage, and compliance with all applicable laws in your jurisdiction. By purchasing, you confirm you are at least 18 years old and legally permitted to purchase, possess, and use this product.
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02
Sharp Edge / Safe Handling
- Extremely sharp edge — risk of serious injury.
- Always cut away from your body; keep fingers clear of the edge at all times.
- Do not leave in a sink or soapy water. Do not store loose in a drawer.
- Keep out of reach of children.
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03
Misuse / Damage Prevention
- Do NOT cut frozen foods, bones, shells, hard pits, or other very hard materials.
- Do NOT pry, twist, scrape on boards, or apply lateral force mid-cut.
- Use proper cutting boards — wood or soft plastic only. Avoid glass, stone, or ceramic surfaces.
- Chipping, bending, or breakage from misuse is not a manufacturing defect.
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04
Carbon Steel Care
Aogami is a carbon steel, not stainless, and will rust if left wet. Hand wash only with mild soap, rinse, and dry immediately after every use. Apply food-safe oil for storage. Do not use a dishwasher.
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05
Box / Packaging
The original box is included with this item, as stated in the product description.
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Returns / Disputes
We do not accept discretionary returns for change of mind or buyer remorse. If your item arrives damaged, faulty, or materially not as described, please contact us through eBay Messages. eBay Money Back Guarantee and applicable consumer laws remain in effect.
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Warranty / Liability
Sold AS IS / WITH ALL FAULTS to the extent permitted by law. We are not liable for injuries, damages, or losses arising from misuse, improper maintenance, or unsafe handling. Where liability cannot be excluded, it is limited to the purchase price of the item.
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Questions?
If you have any questions about condition, care, or use, please send us a message through eBay. We aim to respond within 24 hours.
Shipping & Combined Savings
🇺🇸 USA Shipping (DDP)
All customs duties and taxes are included in the shipping cost. No surprise fees upon delivery.
💡 Exclusive Promo: 2nd Item Ships FREE
Add a Japanese chisel, pull saw, or another kitchen knife from Ichizo Honpo to your order — the 2nd item ships at no extra cost.