Three accoutrements for a Japanese sword, consisting of menuki (hilt ornament), kozuka (knife handle) and kōgai (hair dressing tool), are collectively called “mitokoromono”. Mitokoromono with matching motifs became popular in the Edo period (1600-1868).
This example is made of copper gold alloy. It has a fish-roe pattern on the surface, and various kinds of flowers are depicted in high-relief carving and gold inlay on the granular surface.
The creator of these pieces is Kouno Hauaki, who was a metal smith from the Yanagawa school in Edo (now Tokyo).