This blade is of great documentary interest, not only as an outstanding example of middle-period Soshu school work, but also as a notable example of Hiromitsu's later work. The earliest dated Hiromitsu blade is 1350 with a two-character signature (niji-mei) typical of his early work. This example, dated 1362, bears a full-length signature (naga-mei) and is rare for being both fully signed and dated.

Together with Akihiro, Hiromitsu was the representative Soshu swordsmith during the Nambokucho period. Short o-tanto/ko-wakizashi were extremely popular during this period and were worn as an adjunct to a tachi. (See the footnote to the preceding blade.)

Rather wide and relatively thin, it gives the appearance of a larger, heftier blade. The tanto by Chogi (lot in this catalogue) is another example of this out-sized configuration. The hamon is typical of Hiromitsu and the Soshu tradition in general: beginning quietly with a medium width, it becomes increasingly wide as it approaches the point, where it finishes in a convoluted display of patterns, reaching (very typical of Hiromitsu) an elongated finger-like point and abruptly reversing into a long turn-back. Also typical of his work is the generous use of gonome midare tempering and, particularly, the use of profuse nie. The broad use of hitatsura is probably the best-known of Hiromitsu's trademarks. Although some parts of the itame forging appear slightly coarse, the overall configuration is very fine.