A National Treasure Short Sword: Uraku Rai Kunimitsu

Among the countless Japanese swords that have survived the centuries, few carry as rich a tapestry of history and artistry as the short sword (tantō) inscribed with the name Rai Kunimitsu—known to connoisseurs as the "Uraku Rai Kunimitsu." Designated a National Treasure of Japan in 1955, this masterpiece of the Kamakura period (1185–1333) embodies the pinnacle of Japanese bladesmithing, while its storied provenance links some of the most celebrated figures in Japanese history: from Toyotomi Hideyori to Oda Urakusai, and from the powerful Maeda clan to the modern-day Nagoya Token Museum.

The Rai School and the Master Smith Kunimitsu

The Rai school (来派) was one of the most distinguished lineages of swordsmiths active in Yamashiro Province (present-day Kyoto Prefecture) during the late Kamakura period. Rai Kunimitsu, believed to be the son—or possibly the student—of Rai Kunitoshi, developed a remarkably versatile style that set him apart from his predecessors. While Kunitoshi was known for refined, restrained work, Kunimitsu expanded the school's artistic vocabulary with bold, vigorous blade patterns and robust construction.

Three works by Rai Kunimitsu have been designated as National Treasures: two tachi (long swords) housed at the Tokyo National Museum, and this tantō—the only National Treasure tantō by this master. The inscription "来國光" (Rai Kunimitsu) is carved in confident, large characters on the tang (nakago), a hallmark of Kunimitsu's short sword signatures.

Why Was It Designated a National Treasure?

This tantō was originally recognized as an Important Art Object (重要美術品) under the prewar system. Following the enactment of Japan's Law for the Protection of Cultural Properties, it was elevated to National Treasure status on February 2, 1955. Several factors contributed to this exceptional designation.

First, the blade exhibits outstanding craftsmanship. At 27.7 cm in length with no curvature, the tantō is constructed in the hira-zukuri (flat) style with mitsumune (three-ridged back). It is notably wide and thick—a powerful, imposing form for a short sword. The forging pattern (jigane) features a tightly packed ko-itame (small wood-grain) texture with abundant ji-nie (fine crystalline particles). The tempering pattern (hamon) displays an exquisite interplay of gentle undulations (notare) with clusters of gunome (zigzag) and chōji (clove-shaped) elements, creating a brilliantly dynamic and elegant visual effect.

Second, the blade carries a carved design of a suken (a sacred sword symbolizing Fudō Myōō, the Buddhist deity of immovable wisdom) on the omote (front face), adding both spiritual significance and visual distinction. Third, the tantō is recorded in the Kyōhō Meibutsuchō, the authoritative catalogue of famous swords compiled during the Edo period, where it was valued at 5,000 kan—equivalent to approximately 370 million yen (around 2.5 million USD) in modern currency—confirming its extraordinary reputation even centuries ago.

A Provenance Spanning Centuries of Japanese History

The history of this short sword reads like a chronicle of Japan's most pivotal eras. It was originally a treasured possession of Toyotomi Hideyori, the son and heir of Toyotomi Hideyoshi, the great unifier of Japan. Hideyori bestowed it upon Oda Nagamasu (1547–1622), better known by his Buddhist name Oda Urakusai—and it is from this celebrated owner that the sword takes its distinguished title.

Oda Urakusai was the eleventh son of Oda Nobuhide and the much younger brother of Oda Nobunaga. While Nobunaga is remembered as the ruthless warlord who began the unification of Japan, Urakusai carved out a very different legacy. Though he participated in numerous military campaigns, he was above all a man of culture—a devoted practitioner of the tea ceremony who studied under the legendary tea master Sen no Rikyū. Urakusai went on to found the Uraku school of tea ceremony, and the Jo-an teahouse he built in Kyoto is itself designated a National Treasure. Even the famous Tokyo district of Yūrakuchō bears his name.

After Urakusai's ownership, the tantō passed through the hands of Hon'ami Kōho, a member of the renowned Hon'ami family of sword appraisers and polishers, who brokered its sale to Maeda Toshitsune, the third lord of the powerful Kaga Domain. Toshitsune gave the sword to his second son, Maeda Toshitsugu, lord of the Toyama Domain. However, when the Toyama Domain faced severe financial difficulties, the tantō was returned to the main Maeda family as collateral for a loan—and there it remained for generations, treasured by one of Japan's wealthiest feudal clans.

Exquisite Fittings: The Gold Habaki

The tantō is accompanied by a remarkable gold habaki (blade collar) of exceptional historical value. This double-layered, solid gold habaki bears the inscription "Kataoka Rokuzaemon" on the omote side, and on the base, the name "Umetada" in hiragana alongside "Jusai" in kanji characters. The Umetada family were celebrated metalworkers from the late Sengoku through early Edo periods, and the inscription style—with "Umetada" rendered in kana and "Jusai" in kanji—is consistent with authenticated works by Umetada Jusai.

Additionally, the Kataoka family is believed to be the family of origin of Hon'ami Kōji, the father of the famous calligrapher and ceramicist Hon'ami Kōetsu. Whether the Kataoka inscription indicates the maker or a former owner remains a scholarly question, but the habaki itself further underscores the sword's distinguished lineage.

Where to See It: Nagoya Token Museum (Nagoya Token World)

Today, the Uraku Rai Kunimitsu is owned by the Token World Foundation, established by Token Corporation (Tōken Corporation), and is displayed at the Nagoya Token Museum, also known as "Nagoya Token World" (名古屋刀剣ワールド). Opened in May 2024 in Nagoya's central Sakae district, this state-of-the-art museum is one of Japan's premier destinations for Japanese sword enthusiasts.

The museum houses an impressive collection of up to 200 Japanese swords on permanent display, along with approximately 50 suits of samurai armor, 150 ukiyo-e woodblock prints, and around 350 firearms from both Japan and the West. Visitors can also enjoy interactive exhibits with cutting-edge media technology, a museum shop offering original merchandise and replica swords, and a Japanese café-restaurant called "Yūraku"—named, fittingly, after Oda Urakusai himself.

Nearby Attractions

The Nagoya Token Museum is conveniently located in the heart of Nagoya, surrounded by numerous cultural and historical attractions. Nagoya Castle, one of Japan's most iconic castles originally built by Tokugawa Ieyasu in 1610, lies just a short distance to the north. The Atsuta Shrine, one of the most revered Shinto shrines in Japan and home to the sacred sword Kusanagi no Tsurugi, is easily accessible by subway.

For those wishing to further explore the world of Oda Urakusai, the Jo-an teahouse—his National Treasure tea room—has been relocated to the Urakuen Garden within the grounds of Inuyama Castle in Inuyama City, Aichi Prefecture, about 30 minutes from central Nagoya by train. Visitors can experience the refined aesthetic world that Urakusai created, gaining deeper appreciation for the cultural milieu in which this celebrated tantō was cherished.

In central Nagoya, the Osu Shopping District and Osu Kannon Temple offer vibrant local culture, while the Tokugawa Art Museum displays treasures of the Owari Tokugawa family, providing further context for the feudal era that shaped the history of this remarkable blade.