Tachi (Meirai Kunimitsu)

A Slender Kamakura Tachi Signed by Rai Kunimitsu

Near the end of the tang, cut with a fine chisel in characters smaller than most swordsmiths would use, is the signature Rai Kunimitsu. It names a maker who worked in Kyoto, the old province of Yamashiro, during the final decades of the Kamakura period. The blade he signed is a tachi, the long curved sword that a mounted warrior wore slung edge-down at the hip. Its cutting edge runs 69.5 centimeters, with a curvature of 2 centimeters and a body that tapers from 2.6 centimeters at the base to 1.9 centimeters near the point.

The sword was designated an Important Cultural Property on August 29, 1950. It belongs today to the collection of the Tōken World Foundation in Nagoya, Aichi Prefecture, where it can be shown among the swords on rotating display at the Nagoya Touken Museum.

What sets this blade apart is its build. Rai Kunimitsu is best known for broad, commanding swords with a great deal of activity in the steel. This one is slender. Among the master's surviving works it reads as quiet and restrained, which is exactly why connoisseurs single it out.

The Rai School of Yamashiro

For centuries Yamashiro, the province surrounding Kyoto, was one of Japan's great centers of swordmaking, and the Rai school stood at its head from the middle of the Kamakura period into the Nanbokuchō era that followed. The school took shape under a smith named Kuniyuki and reached its height through Kunitoshi and then Kunimitsu. A Muromachi-period text records a curious tradition that the family name Rai, written with the character meaning "to come," referred to an ancestor said to have arrived from the Korean peninsula. Whether or not that origin is true, it is unusual for a lineage that produced such celebrated Japanese blades to have claimed foreign roots.

Rai Kunimitsu himself remains hard to pin down. He is usually described as the son of Rai Kunitoshi, though older records also call him a younger brother, a grandson, or a pupil. His dated works survive from the early fourteenth century onward, and one of his most famous swords, a National Treasure tachi now in the Tokyo National Museum, carries an inscription corresponding to the year 1327. Three of his blades are designated National Treasures, including the short sword known as the Yūraku Kunimitsu, which is also held in Nagoya.

Why the Blade Was Designated

The value of an old sword lies less in its history of ownership than in what the steel itself reveals, and this tachi rewards close reading. The ground, the broad surface between edge and ridge, is forged in ko-itame, a fine wood-grain pattern, and is well covered in nie, the tiny bright crystals of hardened steel that catch the light like frost. Tempering runs along the back of the blade as well, a feature called mune-yaki that appears here more than usual.

The temper line follows a small irregular pattern, ko-midare, mixed with small clove shapes and threaded with the fine streaks and pooled effects that sword students call ashi and yō. The misty band of nioi runs deep, with a scattering of ko-nie and trailing lines of sunagashi. At the point the tempering gathers into strong nie and brushes outward in a swept effect known as hakikake, breaking up slightly as it turns back.

The tang has been shortened, a common fate for tachi that were remounted in later centuries. Many lost their signatures in the process. This one did not. The small original inscription survives near the trimmed end of the tang, which finishes in the rounded form called kuri-jiri. A signed, dated tradition combined with the maker's recognized hand is what carried the blade onto the national register.

How to Read the Sword in Person

Japanese swords are not displayed point-up like Western blades. A tachi rests horizontally in its case, edge down, the way it was worn. Begin by stepping back to take in the overall shape, the gentle curve and the slim, even taper that make this blade unusual for its maker. Then move close.

Hold your eye at a low angle to the polished surface and let the light travel along it. The wood-grain forging and the frost-like nie only appear when the angle is right, which is why museum cases for swords are lit with care and why many visitors borrow a small monocular. Trace the temper line from the base toward the tip and watch how the small clove shapes rise and fall. The shortened tang and its surviving signature are usually turned so the inscription faces the viewer, a detail worth seeking out once you know how rare it is on a remounted blade.

Where to See It and What Is Nearby

The Nagoya Touken Museum, branded Nagoya Touken World and known locally as Meihaku, stands in the Sakae district at the heart of Nagoya, on the historic Honmachi road that once linked Nagoya Castle with Atsuta Shrine. The museum holds the Tōken World Foundation collection and rotates its swords, armor, ukiyo-e prints, and firearms through changing exhibitions, so a specific blade is shown only at certain times. Checking the current exhibition list before a visit is the surest way to know what is on view.

The location makes a half-day easy to plan. Fushimi Station sits a short walk away and is only a few minutes by subway from Nagoya Station, while Sakae and Ōsu Kannon stations are also close. The Ōsu shopping arcade, a lively warren of street food, secondhand shops, and the Ōsu Kannon temple, lies within walking distance, and Nagoya Castle and Atsuta Shrine are short rides across the city. Travelers who want more swords can continue to the foundation's other sites in the region.