A Japanese sword (o-wakizashi)

A Japanese sword (o-wakizashi), blade 20.75 in., hon-zukuri with hi extending to the nakago-jiri, suguha hamon, nakago with five character mei (Senjuin Yasushige)*, gilt metal habaki; iron tsuba with decoration involving a scroll painting and combining incuse and relief details, remaining mountings and saya of regulation military type (shingunto).

* translation, not firm attribution.