This Tadamitsu of in is known from a single signed and dated , designated at the 15th session in 1967. The of the tang bears the signature Bishu Tadamitsu, and the the date Meio 3 (1494), second month. The published sources open with the standing of the name among the late smiths: Tadamitsu was skilled at tempering among the smiths of . They add at once that several smiths worked under the same name in the same period, and that among them those styled Hikobei-no-jo and Shuri-no- are the best known: 「時代を同じくして同名数工あり、その中で彦兵衛尉、修理亮の名が高い」. The paper does not say which of these hands made the present blade.
The falls just short of two , at 59.1 cm. It is with an , the somewhat high and the extended. The is tightly forged. In the lower part the is a large , becoming a wide toward the upper part. The tends to be tight, and and enter freely. The runs straight to a with a long turn-back. The tang is with a , shallow file marks and two peg holes.
The published sources summarize the blade in one sentence: at the base a mixed with , toward the point a , the turn-back long and deep, and both and excellent. The gentle passing into a straight temper above suits the reputation for with which the paper begins.
The blade is accompanied by an in gold scattered with and kikyo crests. The published sources date the mounting to the late period and note that it is well made.