This is a relic of my father, who passed away 50 years ago. I am entering the phase of preparing for my own passing, so I will be disposing of it. The maker's mark is Kikuhide, it's a single-edged straight blade, and the material is Yasugi steel. It comes with a scabbard and was wrapped in oiled paper, so there is almost no rust. I tried cutting a disposable chopstick with it, and it cuts very well. Length: 30cm, Width: 4cm, Thickness: 2cm, Blade Length: 16.5cm, Blade Thickness: 0.5cm