R2 / SG2 vs Shirogami #1

A powder-metallurgy stainless steel developed by Takefu Special Steel. R2 and SG2 refer to the same steel from different suppliers. Combines surprisingly good stainless properties with very high hardness and excellent edge retention. One of the most practical high-performance steels for everyday use.

Pure high-carbon steel with minimal impurities. Takes a laser-like edge and is easy to sharpen, but more brittle than Aogami. The traditional choice of master woodworkers who demand the finest possible cutting edge and sharpen their tools with religious dedication. Rust forms overnight if neglected.