150mm petty knife from the Ajikataya line by Mutsumi Hinoura. Layered steel construction, shirogami 2 cutting core with iron cladding. Rustic hammermark (Tsuchime) finish with a Magnolia (Ho) wood handle and black horn ferrule.
Shirogami, or white steel, which is a very fine grained carbon steel made from low contaminate iron. It's loved for its ease of sharpening and ability to take a very fine, razor sharp edge.
Mutsumi Hinoura has been training and working in Sanjo with his father, master smith Tsukasa Hinoura, since 2001. His knives are similar, with good distal tapers and wide kiriba style bevels, and really wonderful heat treatments. They both have a lot of experience with hunting and outdoor knives, and their kitchen knives seem to carry some of the same qualities of toughness.
This knife has a hard carbon steel core with iron cladding for added durability. The entire blade will develop a patina with use, especially with acidic foods. Special attention is needed to keep from rusting. Do not leave wet. Hand wash & dry, no dishwasher. This knife if susceptible to chipping with misuse. Hardwood-end grain or softwood long grain cutting boards are preferred; avoid bamboo and plastic cutting boards. Rust can be removed with a light abrasive.