This is an Aritsugu yanagiba knife. The blade length is approximately 20.5 cm. The steel type is unknown (possibly alloy steel). The handle is made of white buffalo horn. I previously listed this item, but I have corrected some areas of concern, re-sharpened it, and polished it. Based on the appearance of the cutting edge and the back, it appears to be made of solid steel, so I believe it is alloy steel. (Aritsugu may not refer to alloy steel as "hon-yaki".) There is a small chip at the top of the white buffalo horn handle, and a slight gap between the handle and the horn. There are some remaining rust marks on the back, but I recommend it if these are not a concern. The cutting edge and the flat surface are almost mirror-finished. It is also lightweight and, due to its size, is recommended for professionals and general households alike. The whetstones used for finishing were Kitayama #8000, Shapton #12000, and a natural whetstone. It is in a very sharp condition and can be used immediately. ● Size: Blade length approx. 20.5 mm ● Blade thickness: Approx. 2.5 mm at the thickest part of the heel ● Overall length: 350 mm ● Weight: 84g #knife #yanagiba #aritsugu #20.5cm