This is a Miyamoto Mio-oroshi Deba knife. The blade length is approximately 27.5cm. It is a single-edged knife. The steel type is unknown. The handle is made of black buffalo horn. I previously listed this item, but I have made some corrections and re-sharpened it. Although it is a large Deba knife, I have classified it as a Mio-oroshi Deba due to the width and thinness of the cutting edge. The blade is thinner than a Deba knife. Given its size, I believe it can handle anything. I have mirror-polished it, so some minor scratches remain. I recommend it if you don't mind them. Both the cutting edge and the flat surface are almost mirror-finished and in good condition. I have re-sharpened and polished it, so I think it will last a long time. This size is not very common, so I recommend it for professionals. The sharpening stones used were Kitayama 8000 grit, Shapton 12000 grit, and a natural stone for finishing. It is in a very sharp condition and ready to use immediately. ● Size: Blade length approximately 275mm ● Blade thickness: Approximately 5.8mm at the thickest part of the base of the blade ● Overall length: 440mm ● Weight: 400g #Knife #Miyamoto #Mio-oroshiDeba #27.5cm