Boxwood, delicately engraved, the pimpled skin subtly engraved and darkly accentuated. Frog crawling across the subtly textured, upper shell of an open walnut, the bottom one showing the flesh of inlaid bone. W.4.5cm. Signed: Sukenaga on the broad rim of the shell, cf. MCI p. 824, Hida school. Condition A.