AN AORIGATA DARK SHIBUICHI TSUBA decorated in nikubori and iroe takazogan with a scene from Kanadehon Chushingura, the night attack on Moronao's house, one of the ronin climbing a rope ladder, another beating on the main gate with a large hammer, signed Katsutoshi Koku (Kawakami family), pupil of Hagiya Katsuhei, circa mid 19th century