Masakage Mizu Collection is handmade by Ikeda san. These knives have been named Mizu (water in Japanese) as the blue/black kurouchi finish gives the impression of cold, deep water. Paired with an oval cherry wood handle, these knives represent excellent bang for the buck. Aogami #2 carbon steel is an excellent steel when forged properly. Rockwell Hardness on these particular knives is 62-64.