Wiki-Mirror Polished

This is one of the finishing processes applied to the blade of a kitchen knife, in which the surface of the blade is polished until it looks like a mirror. The blade is carefully polished with a fine grindstone to create a mirror-like surface.
Mirror finish Japanese knife

Related websites
Mirror Polished Knives: Reflecting Sakai's Finest Craft | KIREAJI
Tadayoshi Yamatsuka: Master of Japanese Knife Mirror Finishing|KIREAJI