Japanese Sakai Soichi Yasuki Hagane Carbon Steel Mi-oroshi Knife CutleryDescription Mi oroshi knives are used primarily as both of sashimi knives and Deba boning knives for fish. They are Japanese knives used primarily for cutting fish. Since Black unpolished finish is not polished, it is rationalized and made efficient. Black unpolished finish may look bluntly but a lot of heart and soul of craftsman inside inversely proportional to the appearance. Condition: Brand New Brand: Soichi Blade material: Yasuki Hagane Steel