The Taima-ha is a sword school that has a special relationship with Taimaji temple in Nara. The founder, Kuniyuki, is said to have been active in the Shō’ō era (1288–1293). Swords with inscriptions from this school are extremely rare, as most swords were not inscribed. There is also stylistic differences between Taima-ha swords with inscriptions and those without.
This sword has a wide and thick body, indicating that it was made by a Yamato swordsmith in the late Kamakura period (1192–1333) based on the curve and shape of its tip. The base metal (jigane) does not have a straight grain (masame), which is often found in the swords of Yamato sword makers, but instead has a finer grain (jinie). The wave-like tempering pattern (hamon), which is made by firing the straight sword (suguha), looks plain at first glance, but actually has many different smaller patterns.
A Daisengan Certificate by Honami Souke XIII, dated to the fifth month of 1703 (Genroku 16) is attached to the sword. Okubo Tadahiro, also known as Ichiō (1817–1888), a samurai and politician of the 19th century, inscribed the sword with a waka poem in gold. The poems reads, “In the depths of the snow, the mountains are also dimly blurred, and the spring of Tomaji dawns.”
The attached vermilion lacquer knife shows a high-level lacquer technique and is said to have been made by the order of Ichiō.