Kochi 240mm Kurouchi Stainless Clad Carbon Wa-Sujihiki kitchen tools Its a medium hardness stone

Its a medium hardness stone that can work up mud pretty easily

but I recommend using something like the Gesshin 400 following this

Weight: 172g

Knife Type: Sujihiki

Width of Spine at Middle: 8

Kochi 240mm Kurouchi Stainless Clad Carbon Wa-Sujihiki kitchen tools Its a medium hardness stoneProduct Description Detailed Specs Measurements The Kochi line is an exclusive to Japanese Knife Imports. These knives have a great in hand feel not too heavy, but not super light. Near the spine they seems to be more substantial, however, behind the edge, the are very thin thin. They are awesome cutters. Near the heel, they have a nice flat spot, and towards the tip, a gentle curve. The octagon burnt chestnut handles are very comfortable and retain