Yoshida Hamono HAP-40 Nakiri Black 170mm (6.7") - BLADE

HAP-40 Nakiri Black 170mm (6.7") - BLADE by Yoshida Hamono

This nakiri blade is forged by Yoshida Hamono, a family-run smithy in Saga Prefecture, Kyushu, Japan, with a long history of crafting traditional Japanese tools and swords by hand. The square-shaped, deep-bellied nakiri profile is built for vegetable prep, letting the full edge meet the cutting board in one clean vertical cut rather than a push or pull motion, so vegetables stay together instead of separating into loose slices. The core is Hitachi's HAP-40 powder steel, hardened to an exceptional 68 HRC, giving it long-lasting sharpness while remaining straightforward to sharpen on whetstones. The blade is constructed using the warikomi (split-and-insert) method, with the hard HAP-40 core jacketed in softer stainless steel for added durability. It has a dark kuro-uchi finish, left raw and unpolished along the spine for a traditional, rustic look that will continue to patina with use. This is a blade only, sold without a handle, so it can be paired with a handle of your choosing.

Specifications
Blade shape: Nakiri
Steel type: HAP-40 powder steel
Steel composition: 1.27 to 1.37 percent carbon, 3.70 to 4.70 percent chromium, 5.60 to 6.40 percent tungsten, 4.60 to 5.40 percent molybdenum, 2.80 to 3.30 percent vanadium, 7.50 to 8.50 percent cobalt
Hardness: 68 HRC
Blade construction: Warikomi, hollow grind, kuro-uchi finish
Bevel: Double bevel, symmetrical
Overall length: 260mm (10.3")
Blade length: 170mm (6.7")
Blade height: 51mm (2.0")
Spine thickness: 2.1mm (0.08")
Weight: 135g (4.8 oz)
Recommended handle size: M
Handle: Not included, blade only
Blacksmith: Yoshida Hamono
Origin: Saga Prefecture, Japan

Care notes
This knife may develop a patina over time due to its low chromium content, which is normal and helps protect the blade. Hand wash and dry thoroughly after use, avoid the dishwasher, and store wrapped or sheathed to control moisture. Use only on wood, plastic, or rubber cutting boards, and avoid cutting frozen food or bone.