A Rai Kunizane Katana (来国真)

Rai Kunizane (来国真) occupies a complex position within the celebrated Rai dynasty of Yamashiro. Tradition holds that he was a son of Rai Kunitoshi, a younger brother of Rai Kunimitsu, and the older brother of Rai Tomokuni – though the NBTHK notes that stylistic and chronological evidence makes these precise relationships difficult to confirm. What is certain is that Kunizane worked at the heart of the Rai tradition, and that his surviving signed works – held at the Jingû Chôko Museum, the Reimeikan, and the Tokyo National Museum – are almost exclusively tanto and wakizashi. A Rai Kunizane katana, even ô-suriage, is an uncommon thing.

The blade is everything one hopes for from the Rai school at its finest. The jihada is an itame mixed with mokume and nagare, with a hada-tachi tendency and fine ji-nie that gives the steel a cold, luminous quality – the kind of crystalline, icy surface that sets the best Rai work apart from all its contemporaries and has made the school so enduringly prized. The hamon is a suguha-chô with chôji and gunome, small ashi, the lower half resolving into ko-midare, with ko-nie distributed throughout. The bôshi is gently midare-komi with hakikake at the tip. A bôhi is engraved on both sides, running as kaki-nagashi into the tang.

The nakago carries a kinzôgan-mei on the omote reading “Rai Kunizane” (来国真), with the Hon’ami kaô and Mitsuichi seal on the ura – a gold-inlaid attribution by Hon’ami Mitsuichi, one of the Hon’ami family’s most respected appraisers, whose imprimatur served for centuries as the highest form of authentication in the Japanese sword world. The blade passed Jûyô Tôken at the 30th session in November 1983, and the combination of the Hon’ami attribution and the NBTHK certification leaves no ambiguity about what this sword is.