At 120mm, this petty from Kousuke Muneishi is sized for small, detailed tasks like trimming proteins, peeling, and prepping garnishes, while still carrying the same thin, well realized grind found across the rest of his Yusaku line. Kousuke is a third generation blacksmith working out of Tosa, Japan.
The core is Blue #2 steel, also called Aogami #2, laminated with stainless steel through the san mai method, with a sand blasted nashiji, or pear skin, finish across the blade face. The handle is an octagonal oak with an urushi finish. The Muneishi family business goes back to 1955, when it began making farming and forestry tools, a tradition his father carried forward with Aogami #2 cutting tools before Kousuke began making kitchen knives under the Yusaku name.
Care Instructions:Blue #2 is a reactive carbon steel, so wipe and dry the blade immediately after each use rather than letting it sit. Avoid leaving acidic foods against the blade for long stretches, and apply a light coat of camellia oil for longer term storage. Hand wash only, and sharpen on quality water stones when the edge needs attention.
The core is Blue #2 steel, also called Aogami #2, laminated with stainless steel through the san mai method, with a sand blasted nashiji, or pear skin, finish across the blade face. The handle is an octagonal oak with an urushi finish. The Muneishi family business goes back to 1955, when it began making farming and forestry tools, a tradition his father carried forward with Aogami #2 cutting tools before Kousuke began making kitchen knives under the Yusaku name.
Care Instructions:Blue #2 is a reactive carbon steel, so wipe and dry the blade immediately after each use rather than letting it sit. Avoid leaving acidic foods against the blade for long stretches, and apply a light coat of camellia oil for longer term storage. Hand wash only, and sharpen on quality water stones when the edge needs attention.
- Brand: Yusaku
- Blacksmith: Kousuke Muneishi
- Location: Tosa, Japan
- Construction: Hammer Forged, San Mai
- Edge Steel: Blue #2 (Aogami #2)
- Cladding: Stainless Steel
- Finish: Nashiji
- Edge Grind: Even
- Handle: Oak Urushi Octagonal
- Weight: 2.9 oz (82 g)
- Blade Length: 123 mm
- Total Length: 260 mm
- Spine Thickness at Heel: 3.1 mm
- Blade Height at Heel: 30.5 mm











