Kozuka signed "Toshichika". There where few artist that signed with this name, It could be Nara Toshichika (H. 10296.0) active around 1750, who worked in a late Nara School style.
Decorated with Gama sennin with a frog.
Kozuka back is made of shakudo, front is made of brass. With shibuichi and copper inlay and gold iroe.
Made in late Edo period.
Kozuka: 99 mm x 15 mm x 5 mm
Kogatana: 11,5 cm