This work is a further development of the`` collaboration of kitchen knives and indigo dyeing''. The blade was made by Yu Kurosaki in Fukui Prefecture, which Japan is proud of to the world. The handle and scabbard are indigo-dyed and luxuriously coated with Tenmoku, a pottery technique, and Kanshitsu, a lacquer coating technique, and the uneven texture of the surface makes it easy to grip. . Please enjoy the unique presence of Mr. Kurosaki's "flash" and indigo-dyed "tenmoku".