Black Lacquered Sword (unsigned Blade)

The Black-Lacquered Tachi of Sanage Shrine: A Kamakura-Era Sword Treasured at the Foot of a Sacred Mountain

Tucked away in the deep forests of Toyota City, Aichi Prefecture, Sanage Shrine has guarded a remarkable collection of arms and armour for centuries. Among its sacred treasures stands the Black-Lacquered Tachi with unsigned blade (Kokushitsu Tachi, tōshin mumei), a Kamakura-period long sword designated as a National Important Cultural Property of Japan in 1952. Although the blade itself bears no maker's signature, the elegant lacquered mounting and the dignity of its preserving shrine make this artefact a compelling window into the martial culture of medieval Japan and the long history of one of Mikawa Province's most venerable sanctuaries.

Historical Background

Sanage Shrine sits at the foot of Mount Sanage, a 629-metre peak that has been revered as a sacred mountain since antiquity. The shrine appears in official histories as early as 851, when the court bestowed upon it the rank of Junior Fifth Rank Lower in the chronicle Nihon Montoku Tennō Jitsuroku. By the Heian period it had been recognised as the Third Shrine (Sannomiya) of Mikawa Province, an honoured station within the provincial hierarchy of cultural and religious centres.

The principal deity venerated here is Ōusu-no-Mikoto, the twin elder brother of the legendary hero Yamato Takeru. According to shrine tradition, Prince Ōusu died on Mount Sanage from snake venom in the fifty-second year of Emperor Keikō's reign, and was buried on the mountain. The summit precincts include the East Shrine and the West Shrine, which together with the main hall form the Sanage Three-Shrine Daimyōjin complex.

The Black-Lacquered Tachi entered the shrine's possession during the Kamakura period (1185–1333), an age when warrior families of central Japan looked to powerful local sanctuaries as both spiritual protectors and repositories for ceremonial offerings. Long swords were among the most valued offerings a samurai patron could make. Although the historical record does not preserve the donor's name, the sword has remained continuously at Sanage Shrine for some seven to eight centuries, surviving warfare, fires, and the upheavals of religious reform during the Meiji era.

Why It Was Designated as an Important Cultural Property

The Black-Lacquered Tachi was designated an Important Cultural Property under the registration number 01629 on 29 March 1952, just two years after Japan's modern Cultural Properties Protection Act came into effect. The designation reflects three intertwined values that scholars and curators identified in the artefact.

The first is craftsmanship. Although the blade carries no signature — a condition known as mumei, common among older swords whose tang inscriptions were lost or never carved — its forging characteristics place it firmly in the Kamakura period, an era widely regarded as the golden age of Japanese sword-making. The second value lies in the mounting itself. The black-lacquer style, kokushitsu-zukuri, was the standard practical mount for samurai of the Kamakura age, and surviving examples in original condition are increasingly rare. The third is provenance. Continuous custody by a single shrine for so many centuries is itself extraordinary, and provides art historians a rare opportunity to study a complete sword of the period in its original ceremonial context.

Sanage Shrine holds several other nationally designated treasures alongside this tachi, including a Heian-period long sword signed by Yukiyasu, a kashidori-itoodoshi armour with great sleeves, and important early manuscripts. Together they make the shrine one of the most significant repositories of medieval arms in eastern Mikawa.

Highlights of the Sword and Its Mount

The defining feature of a kokushitsu tachi is the application of black urushi lacquer across the entire scabbard, the hilt wrappings, and often the metal fittings as well. Polished to a deep, light-absorbing sheen, the lacquer not only protected the wood from humidity but also conveyed a sober, restrained aesthetic that suited the warrior values of the Kamakura age.

The sword form is that of a classical tachi — a long, gracefully curved blade designed to be slung edge-down from the waist of a mounted warrior. Such tachi were both battlefield weapons and emblems of social rank. When dedicated to a shrine, they became sacred objects believed to embody the protective spirit of the deity, and were brought out only for special occasions or temporary public exhibitions.

For visitors with an interest in arms and armour, the very fact that the sword has remained intact within its original mount for so long is itself a marvel. Most surviving Kamakura tachi exist today only as bare blades, the original lacquered scabbards having been lost or replaced over centuries of remounting. The Sanage example offers a glimpse of how these weapons looked and felt to the samurai who carried them.

Visitor Information

Sanage Shrine is open to the public year-round and welcomes visitors from across Japan and abroad. The shrine grounds include the main worship hall, the four-sided pavilion, the inner gate, the bath of purification waterfall, and the drum hall. A grove of cedars lines the long approach, and at the inner gate one can see the celebrated votive offerings of left-handed sickles — small metal plaques shaped like sickles, dedicated by worshippers in honour of the deity who was said to have been left-handed.

The Black-Lacquered Tachi itself is normally kept in safekeeping and is not on regular public display. As is the case with most nationally designated swords held by shrines and temples, viewing is generally limited to occasional special exhibitions arranged in cooperation with museums or cultural institutions. Travellers hoping to see the sword in person are advised to enquire in advance with the shrine office or to consult announcements from the Toyota City Board of Education.

Even without seeing the sword directly, a visit to Sanage Shrine offers a deeply atmospheric experience: forest paths, a sacred mountain, a quiet inner sanctuary, and the rich layered history of one of Mikawa's three highest-ranking shrines.

Things to See Nearby

The area around Sanage Shrine rewards a full day of exploration. Mount Sanage itself offers gentle hiking trails leading to the East Shrine and West Shrine on the summit ridge, with views toward Mount Haku and Mount Ontake on clear days. Along the route, walkers encounter unusual rock formations such as the Mifuneishi, the Frog Rock, the Folding-Screen Rock, and the natural-monument spherical granite known as Kikuishi.

Closer to the shrine, the Sanage Bō-no-te Park preserves the heritage of the local martial dance tradition, while the Sanage Onsen offers natural radon hot-spring bathing in a mountain setting. The Aichi Prefectural Greening Centre and the nearby museums of Seto ceramics provide further cultural depth, and Toyota City's downtown — easily reached by bus — features the renowned Toyota Automobile Museum and other industrial heritage sites.

For those visiting in autumn, the shrine's maple grove turns brilliant colours in November, and the Sanage Festival held on the second weekend of October features the spirited bō-no-te martial demonstrations, mikoshi processions illuminated by torchlight, and shrine-maiden dances.