Wooden tonkotsu with inlaid decoration, Japan, late Edo period, 19th centuryInlays of ivory, mother-of-pearl, horn and tortoiseshell on each side showing an egret among lotus leaves. Carnelian ojime and ivory netsuke representing a rat hunter. The tonkotsu signed Sadayama in a mother-of-pearl cartouche and the Gyokuseki netsuke. The later netsuke. 10 x 9 cm ; netsuke weight : 20 g