Yamashin works out of Tosa, a region known for turning out some of the most prolific knife makers in Japan, and has spent generations building a reputation for blades that earn their place in a working kitchen. No frills, no shortcuts, just honest construction and real cutting performance.
This petty is hammer forged in a san mai construction, with a Shirogami #1 core, the purest grade of white paper steel, clad in soft iron that develops a beautiful patina over time. At 120mm, it is a natural fit for in-hand work, peeling, trimming, and detail cuts where a longer blade would feel unwieldy. The extra blade height of 40mm sets it apart from most petties in this size range, adding useful knuckle clearance and making it easy to scoop small cuts from the board, and the walnut octagonal handle with black pakka wood ferrule rounds out a knife that feels genuinely well made.
What Customers Are Saying: The one reviewer to weigh in so far calls it a no-brainer for anyone looking for a tall petty. The factory edge was already fine for most uses and took only a few minutes on the stones to bring up to a hair-splitting sharpness. Fit and finish are not perfect, with a rustic character that comes through, but the blade is thin behind the edge and cuts as well as it looks.
Care Instructions: Carbon steel care is straightforward. Wipe the blade clean during use and dry it immediately after washing. Avoid leaving water or acidic foods on the blade for any length of time. The soft iron cladding will develop a natural patina with use, which adds character and provides a measure of protection. Each knife is made by hand so measurements may vary.
This petty is hammer forged in a san mai construction, with a Shirogami #1 core, the purest grade of white paper steel, clad in soft iron that develops a beautiful patina over time. At 120mm, it is a natural fit for in-hand work, peeling, trimming, and detail cuts where a longer blade would feel unwieldy. The extra blade height of 40mm sets it apart from most petties in this size range, adding useful knuckle clearance and making it easy to scoop small cuts from the board, and the walnut octagonal handle with black pakka wood ferrule rounds out a knife that feels genuinely well made.
What Customers Are Saying: The one reviewer to weigh in so far calls it a no-brainer for anyone looking for a tall petty. The factory edge was already fine for most uses and took only a few minutes on the stones to bring up to a hair-splitting sharpness. Fit and finish are not perfect, with a rustic character that comes through, but the blade is thin behind the edge and cuts as well as it looks.
Care Instructions: Carbon steel care is straightforward. Wipe the blade clean during use and dry it immediately after washing. Avoid leaving water or acidic foods on the blade for any length of time. The soft iron cladding will develop a natural patina with use, which adds character and provides a measure of protection. Each knife is made by hand so measurements may vary.
- Maker: Yamashin
- Location: Tosa, Japan
- Construction: Hammer Forged, San Mai
- Edge Steel: Shirogami #1 (White Paper Steel)
- Cladding: Soft Iron
- HRC: 60+
- Edge Grind: 50/50
- Handle: Walnut Octagonal
- Ferrule: Black Pakka Wood
- Weight: 2.7 oz (78 g)
- Blade Length: 127 mm
- Total Length: 255 mm
- Spine Thickness at Heel: 4 mm
- Blade Height: 40 mm
Reviews
1 review(s) WRITE A REVIEW (Reviews are subject to approval) An absolute steal , June 26, 2026Posted By: DK
At $75 this is a no-brainer for anyone looking for a tall petty. Edge of the box was what most would consider absolutely fine and took about 5 minutes to make hair-splitting sharp. Fit and finish aren’t perfect but it is delightfully rustic, thin behind the edge, and cuts great. I bought this as a project knife but honestly I’m not sure I’m going to do much to it other than use it.
At $75 this is a no-brainer for anyone looking for a tall petty. Edge of the box was what most would consider absolutely fine and took about 5 minutes to make hair-splitting sharp. Fit and finish aren’t perfect but it is delightfully rustic, thin behind the edge, and cuts great. I bought this as a project knife but honestly I’m not sure I’m going to do much to it other than use it.
