Beautiful shibuichi kozuka signed Somin with kakihan mark.
The first generation Somin (1670-1733) was the second generation of the Yokoya school a pupil of the great Yokoya Soyo and well known for his skilled katakiribori engraving.
Design of Shoki the demon slayer standing with his sword drawn carved in katakiri bori which is very difficult to photogragh but beautiful to see in the hand.
Great example of Edo period (18th Century) Japanese craftsmanship.
Mei seems to be the same like in Markus Sesko E-signatures of Japanese Sword Fittings Artists but wasn’t examined by experts.

shoki