Kozuka

Mino School.  Mantis with 2 singing insects. Back is half/cat scratch.  This design is still being produced so you must be careful.  Mid to late Edo period.

Mino School.  16 or 17th century.  Copper.   Mantis with autumn plants. Has matching fuchi/kashira and tsuba.

Mantis and other insects.  Shibichi and/or copper metal.  gold inlay.  Meiji period(?)

Kaga School.  Amazing tiny inlays of different metal inlays including silver, gold, copper and shakudo.  9.7ｘ1.４cm.  Kaga school kozuka often have a design on the back done usually in a kebori engraving.  This piece has an inlaid silver moon.