Tachi〈Meiji (Kitsunegasaki)〉

Tachi Inscribed "Tamenji" (Kitsunegasaki): A National Treasure Sword That Witnessed a Pivotal Moment in Kamakura History

Few swords in Japan carry a story as compelling as the National Treasure Tachi inscribed "Tamenji," popularly known as "Kitsunegasaki." Forged in the early Kamakura period by a master of the Ko-Aoe school in Bitchu Province, this long sword is celebrated not only for its extraordinarily pristine condition but also for its role in one of the most dramatic power struggles of early Kamakura shogunate politics. Today, the blade rests at the Kikkawa Museum in Iwakuni, Yamaguchi Prefecture, where it has been treasured by the Kikkawa family for more than eight centuries.

Historical Background: A Sword Born of Bitchu Steel

The blade was forged by Tamenji, a swordsmith of the Ko-Aoe (Old Aoe) school that flourished along the Takahashi River in Bitchu Province, in what is now Okayama Prefecture. The Aoe smiths rose to prominence from the late Heian period into the Kamakura era, earning a reputation alongside the Bizen and Yamashiro traditions for producing blades of exceptional beauty and function. Ko-Aoe work is generally distinguished by its elegantly slender form, a distinctive "chirimen" (crepe-like) forging pattern in the steel surface, and a refined temper line that evokes the understated aesthetics of court culture during Japan's transition from aristocratic to warrior rule.

The sword then entered history on the twentieth day of the first month of Shoji 2 (1200), when a warrior named Kikkou Kojiro Tomokane — the ancestor of the later Kikkawa clan of Iwakuni — carried it into battle at a place called Kitsunegasaki in Suruga Province, corresponding to today's Shimizu Ward in Shizuoka City. The engagement arose from the so-called "Kajiwara Kagetoki Incident," in which Kagetoki, once a trusted retainer of the first shogun Minamoto no Yoritomo, had fallen from favor after Yoritomo's death and was fleeing toward Kyoto with his sons and followers. At Kitsunegasaki, forces loyal to the second shogun Minamoto no Yoriie intercepted the Kajiwara party, and Tomokane is recorded as having slain Kajiwara Kagemochi — Kagetoki's third son — using this very blade. The event is documented in the Azuma Kagami, the official chronicle of the Kamakura shogunate, giving the sword a firmly dated historical provenance that is rare for any weapon of such age.

Why It Was Designated a National Treasure

The sword was first recognized under the prewar designation system as a former National Treasure on January 23, 1933, and was then designated a National Treasure under the postwar Protection of Cultural Properties Law on June 9, 1951. Several qualities place it at the very summit of Tamenji's surviving work.

The first is its physical state. Because Tomokane and his descendants preserved the sword as a family heirloom rather than carrying it into further battle, the blade has barely been polished down over the centuries. Its original geometry — the generous thickness of the flesh near the edge, the strong curvature at the hilt, and the crisp, narrow point — remains essentially as the smith delivered it. Blades of this age are almost always reduced by repeated sharpening, so a sword that survives in such a near-original state is itself a rare historical document.

The second is its artistry. The blade shows a small itame (wood-grain) forging pattern with a characteristic crepe-like surface, a faint undulating reflection rising from the ground, and a temper line of small irregular waves mingled with subtle choji (clove-shaped) features. The dignified stance with its high waist curvature is considered among the finest works attributable to Tamenji.

The third is the survival of the original koshirae, or sword mounting. The designation formally includes the accompanying black-lacquered leather-wrapped tachi mounting, a contemporary fitting that paired with the blade when Tomokane wore it. Few weapons from the early Kamakura period retain both blade and original scabbard, making the ensemble an exceptional reference for the material culture of early samurai society.

Highlights and Points of Interest for Visitors

Although the blade is normally kept in careful storage, the Kikkawa Museum brings "Kitsunegasaki" out for scheduled public viewings — most often during autumn exhibitions, with occasional special openings at other times of year. When displayed, several features reward close attention.

Look first at the overall silhouette. The pronounced curvature toward the hilt and the robust body mass give the sword the dignified posture characteristic of early Kamakura tachi, designed to be worn edge-down suspended from a mounted warrior's waist. The signature "Tamenji" is cut in two small characters on the nakago (tang), on the side that would face outward when worn.

Next, study the surface of the steel. Under proper lighting the crepe-like jitetsu emerges from within the polish, accompanied by a gentle midare-utsuri — the shadowy reflection of the hardening process that runs parallel to the edge. The temper line itself is restrained and elegant rather than flamboyant, and is considered an exemplar of Ko-Aoe aesthetics.

Finally, appreciate the accompanying black-lacquered mounting. Its understated surface and practical construction speak to the functional elegance of early samurai taste, a world removed from the decorative extravagance of later peacetime sword fittings.

The museum itself is worth a careful visit in its own right. Opened in November 1995, it houses roughly 7,000 items handed down through the Kikkawa family over eight centuries, and rotates exhibitions approximately three to four times a year. Beyond "Kitsunegasaki," visitors may encounter Important Cultural Property documents including the Kikkawa Family Documents, a manuscript of the Azuma Kagami, and Kikkawa Motoharu's own copy of the Taiheiki. The garden, laid with white gravel from Awaji Island and a black granite stone stage, was designed around imagery from Zeami's treatise on Noh, Fushikaden.

Surrounding Attractions

The Kikkawa Museum sits inside Kikko Park on the west bank of the Nishiki River, within one of western Japan's most photographed historical landscapes. Within a short walk, visitors can experience: the Kintai-kyo, a five-arched wooden bridge originally built in 1673 and counted among Japan's three most celebrated bridges; Iwakuni Castle, reached by a ropeway from the park, offering sweeping views of the Seto Inland Sea; Kikko Shrine, dedicated to the ancestral spirits of the Kikkawa lords; and the Nagayamon gate of the Kagawa family, a preserved samurai residence gate. The Iwakuni Chokokan Museum and several other small museums are also clustered within the park, making the area well suited to a full day of cultural exploration.