Multipurpose knife, blade length 17.5cm, 156g. The back is about 1.9mm thick near the top of the heel. It seems to be read as Kyuseisaku, and it's a brand of Echizen cutlery. Although it's a sandwiched knife, the steel sandwiched is local Echizen's V Gold No. 10, so it's stainless steel. The soft iron on the sides shines brightly and is beautiful. The handle is an integrated bolster, but it uses what appears to be ebony, giving it a high-class feel that sets it apart from ordinary knives. The original price was undoubtedly high. It seems like it will last for a while. I sharpened it well, put an edge on it, and polished it. Please see my profile for the detailed restoration process.