Tachi (Mei Mitsutada)

Two Characters That Survived Seven Centuries

Near the end of the tang, close to the back edge, two characters are cut into the steel: Mitsutada. The blade they sign was forged in Bizen Province, on the western shore of the Seto Inland Sea, sometime in the middle decades of the thirteenth century. At some later point the sword was shortened at the tang, a common fate for old tachi adapted to changing fashions of wear, and that shortening could easily have erased the signature forever. It did not. The two characters survived, and largely because they did, this sword is today a National Treasure of Japan.

The Tachi Signed Mitsutada belongs to the Tokugawa Art Museum in Nagoya, where it forms part of one of the finest sword collections in private hands anywhere in the country. Its maker, Mitsutada, founded the Osafune school of swordsmiths, the most prolific lineage in the history of the Japanese blade. Authentic signed works by him are remarkably scarce. To stand in front of this one is to read the founder's own hand.

Mitsutada and the Birth of Osafune

Osafune was a village on the Yoshii River in Bizen, present-day Okayama Prefecture. Iron sand from the surrounding hills, river transport, and charcoal from nearby forests made the area a natural center of sword production, and from the mid-Kamakura period onward Osafune smiths supplied blades to warriors across Japan for some four hundred years. Mitsutada, active around the mid-thirteenth century, is regarded as the school's founder. His son Nagamitsu and the generations that followed built Osafune into a name that any student of Japanese swords learns first.

Records of the Agency for Cultural Affairs describe two distinct shapes among Mitsutada's surviving tachi. One is broad and imposing, with the stout, compact point called ikubi-kissaki, literally a boar's neck. The other is slimmer and quieter, with a medium point. This blade follows the first, more muscular type. Compared with contemporary Bizen rivals such as the Ichimonji, Hatakeda, and Kunimune smiths, Mitsutada's steel is noted for its clarity. The surface seems to have light inside it.

One detail makes his work tantalizing for connoisseurs. Mitsutada signed relatively few of his blades, or at least few signatures survive, since the lower part of a tang is exactly what gets cut away when a sword is shortened. Many works attributed to him are unsigned and rest on the judgment of appraisers. A blade carrying his genuine two-character signature is therefore a fixed point in the study of the entire Osafune tradition.

Why It Became a National Treasure

The Japanese government designated this tachi an Important Cultural Property on November 14, 1953, and elevated it to National Treasure on March 20, 1954, under designation number 146. The official record is direct about the reason: this is one of the very few signed works by the founder of the Osafune school.

Rarity alone would not have been enough. The blade itself shows Mitsutada's craft at full strength. It measures 72.4 centimeters along the cutting edge with a curvature of 2.2 centimeters, a shallow curve that, together with the ikubi-kissaki point, gives the sword the confident, forward-leaning posture associated with the height of Kamakura-period taste. The forging produced a fine, tightly knit itame grain, and across the surface floats midare-utsuri, a misty shadow of the hardening pattern that appears on the body of the blade above the temper line. Utsuri of this clarity is a signature of classical Bizen work and is exceptionally difficult to reproduce; modern smiths have spent careers trying.

The hamon, the crystalline line left by differential hardening, runs in small clove-shaped choji mixed with small irregularities. Within it appear rounded forms the old appraisers named kawazuko, tadpoles, for their swollen heads and narrow tails. On the reverse side the line doubles in places, and patches of isolated hardening called tobiyaki scatter above it. Streaks of bright nie crystals known as kinsuji, gold lines, flash inside the hamon when the blade is tilted under light. None of this is visible from a photograph in any honest way. The activity in the steel only resolves itself in person, at an angle, with patience.

From the Shogun's Hand

The sword's documented history at the Tokugawa Art Museum begins with a single evening of high ceremony. In 1698, the fifth Tokugawa shogun, Tsunayoshi, paid a formal visit, an onari, to the Edo residence of the Owari Tokugawa family. The Owari branch, founded by Tokugawa Ieyasu's ninth son Yoshinao, ranked first among the three great collateral houses of the shogunal line, and an onari was among the highest honors a shogun could extend. Gifts moved in both directions on such occasions, chosen with extreme care because every object carried political weight. According to the museum's records, it was at this 1698 visit that the third Owari lord, Tokugawa Tsunanari, received this Mitsutada from the shogun's own collection.

The blade then remained with the Owari Tokugawa for more than two centuries. When the nineteenth head of the family, Tokugawa Yoshichika, established the Tokugawa Reimeikai foundation and opened the Tokugawa Art Museum in 1935, the sword passed into the museum's care along with the rest of the daimyo treasury, never scattered, never sold.

One point of precision for sword enthusiasts: the museum owns a second tachi signed Mitsutada, an Important Cultural Property presented by Toyotomi Hideyori to Yoshinao in 1611. The two are easily confused in casual references. The National Treasure described here is the blade associated with Tsunayoshi's gift of 1698.

Seeing the Blade, and What Surrounds It

The Tokugawa Art Museum stands in a quiet residential quarter of eastern Nagoya, on the former grounds of an Owari family villa. Like nearly all Japanese museums, it rotates its displays to protect the objects, so this tachi is not on permanent view. The museum's sword gallery, designed around the collection's nine National Treasures and dozens of Important Cultural Properties, always has superb blades on display, but visitors hoping to see this specific Mitsutada should check the exhibition schedule on the museum's website before traveling.

Plan on sixty to ninety minutes inside, longer if swords are your reason for coming. The galleries recreate the formal spaces of a daimyo residence, including a reconstructed noh stage and tea rooms, so the collection reads as a way of life rather than a row of cases. The Hosa Library, holding the Owari family's books and maps, adjoins the museum, and next door spreads Tokugawaen, a pond-centered stroll garden that is small, carefully kept, and at its best in late November when the maples turn.

Access is straightforward. From Nagoya Station, the Me~guru sightseeing loop bus and the city bus route Kikan 2 both stop at Tokugawaen Shindeki, about thirty minutes away, with a three-minute walk remaining. Alternatively, take the JR Chuo Line to Ozone Station and walk roughly fifteen minutes. The museum opens from 10:00 to 17:00, with last entry at 16:30, and closes on Mondays, or the following weekday when Monday falls on a holiday. General admission is 2,000 yen as of April 2026; fees vary with special exhibitions, and junior high school students and younger enter free.