A Japanese sword

A Japanese sword, blade 28 in., hon-zukuri, midare hamon, nakago with signature mei (Kawachi Kami Kunisuke), gilt habaki; plain oval tsuba, tachi-koshirae, the part gilt fuchi and kabutogane embellished with a design of flowing waves in low relief, laquered with writhing dragon in gold, ishi-dzuki and shiba-biki en suite to the hilt fittings.