Tachi Sword (inscribed Rai Kunitoshi, Dated August 1st Year

A Kyoto Sword Dated to 1319

The tang of this sword carries a date. Its maker cut the characters for the eighth month of the first year of Gen'ō, a reckoning that places the work in 1319. Beside the date he signed his name in three characters: Rai Kunitoshi. The blade is a tachi, the long, deeply curved sword that mounted warriors of the Kamakura period wore edge-down at the hip. It has come down through private hands, and today an owner in Nara Prefecture holds it. The official record lists it plainly as the property of an individual.

Rai Kunitoshi worked in Kyoto, then the imperial capital. He belonged to the Rai school, a line of smiths active in Yamashiro province from the middle of the Kamakura period onward. Dated blades from his hand run from 1278 to 1321. The 1319 inscription on this sword falls near the close of that span, among the last works he is known to have made.

Why the Sword Matters

The Japanese government listed the blade as an Important Cultural Property on 2 February 1955, under designation number 1750. That ranking covers metalwork of national significance one step below National Treasure. Several of Kunitoshi's swords hold one status or the other, and the sheer number of his dated surviving blades is part of why scholars weigh his work so heavily.

Those dates settle a long argument. Some blades attributed to him are signed with only two characters, Kunitoshi, while others carry the three characters Rai Kunitoshi. The two groups differ in shape and in temper pattern, and earlier connoisseurs proposed that two separate smiths were responsible. Then there is a blade dated 1315 that records its maker's age as seventy-five. Read against the full run of dates, the evidence now points to a single long-lived smith: the two-character signatures belong to his early years, the three-character ones to middle age and after. This 1319 sword, signed in three characters, sits with the later group, made when Kunitoshi was in his late seventies.

Reading a Late Rai Kunitoshi

The smith's early blades are broad and assertive, finished with a flamboyant clove-shaped temper pattern the Japanese call chōji-midare. His later work turned in the opposite direction. The shape grew slender, and the temper line settled into suguha, a narrow, near-straight band of hardened steel that follows the edge. Restraint took the place of display.

This blade belongs to that late manner. The steel surface, or jigane, shows the fine, tightly packed grain called ko-itame, scattered with the bright particles of ji-nie that flare when the blade is tilted under a light. Standing close, a viewer looks less for drama than for evenness, the quiet assurance of a craftsman with four decades behind him.

Where to See Rai Kunitoshi's Work

This 1319 sword is privately owned and is not on regular public display. Anyone hoping to stand before Kunitoshi's steel has better luck with the works kept in public collections, several of them within easy reach of travelers.

The Tokyo National Museum holds two of the finest. One is a National Treasure tachi signed with the two-character Kunitoshi, handed down through the Arima family and reckoned the most powerful of his blades. The other is a short sword, or tantō, dated 1316 and signed Rai Kunitoshi, owned by Atsuta Shrine in Nagoya and kept on deposit at the museum. Both appear in the sword gallery on a rotating schedule rather than year-round, so it pays to check the current display list before a visit.

In Nagoya, the Tokugawa Art Museum keeps an Important Cultural Property tachi by Rai Kunitoshi dated 1315, its signature giving both the year and the smith's age. There is also a sword no one can see. Hotarumaru, a great blade by Kunitoshi once enshrined at Aso Shrine in Kumamoto and listed as a National Treasure under the prewar system, vanished in the disorder after 1945 and has never resurfaced. A full-scale reconstruction was forged and dedicated to the shrine in 2017, a modern reply to an old loss.