Sugata (configuration): shinogi-zukuri (longitudinal ridgeline) with shallow torii-zori (even curve), medium kissaki (tip of blade); kitae (forging pattern) details obscured by rubbing; hamon (tempering pattern) tight chōji notare but finer details obscured by rubbing, copper habaki (collar); tsuka (handle) wooden wrapped in samegawa (ray skin) and black silk braiding, long nakago (tang), one mekugi-ana (peg hole), signed Kashu ju Darani Tachibana Katsukuni saku on omote and 千秋萬 (untranslated) on ura

Koshirae (mounting): saya (scabbard) of dark red lacquer with black kurikata (cord holder), oval iron tsuba (sword guard) with two hitsu-ana (holes for side knives) and low relief decoration of flowering plum blossom

This is most likely the third generation Katsukuni who worked in the latter half of the seventeenth century.

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