Toshihiro Wakui hand forges this series in Shirogami #2 (white steel) in a cladding of stainless steel with an 'D' shaped red ebony and horn handle. Super easy to sharpen to an amazingly fine edge with a light and thin profile.
White steel is a very fine grained carbon steel made from a very low contaminate iron loved for it's ease of sharpening and ability to take a very fine razor sharp edge. White steel is a favorite of sushi chefs for knives in which a very fine finish is essential. Not the easiest steel to forge and temper properly, white steel done well is a testimony to a smith's skill. White steel is fairly reactive and requires care to avoid rust.