Sword〈Mei Mitsutada〉

A Mitsutada That Breaks the Pattern

Most blades signed Mitsutada are long, shallow-curved tachi, the kind a mounted warrior wore edge-down at the hip. This one is the opposite sort of object: a short, straight, double-edged blade just 27 centimeters long, with a ridge running down each face. The tang carries the two-character signature of Mitsutada, the smith credited with founding the Osafune school of Bizen province in what is now Okayama Prefecture. He worked in the middle of the Kamakura period, in the thirteenth century.

The form has its own name in Japanese: a ken, the straight, symmetrical, twin-edged sword that predates the familiar curved katana. Ken were never everyday fighting weapons in the way tachi were. They sat closer to ritual and to Buddhist iconography, and far fewer of them were ever made. For a smith remembered above all for his tachi to put his name to one is the first thing that marks this blade out.

Why It Was Designated

The sword was registered as an Important Cultural Property on 8 June 1974. The case for it turns on scarcity rather than scale. Signed tachi by Mitsutada survive in reasonable numbers, and several rank as National Treasures or Important Cultural Properties in their own right; a ken bearing his signature is genuinely uncommon. The national catalogue entry rests its judgment on exactly that pairing, an authenticated Mitsutada signature joined to this unusual form.

Mitsutada is weighted so heavily because of what followed him. The Osafune lineage he began passed to his son Nagamitsu, then through Kagemitsu and Kanemitsu, and continued to produce blades into the late Edo period. No other school in the history of Japanese swordmaking ran as long or as productively. Oda Nobunaga is said to have valued Mitsutada's work enough to gather thirty-two of his blades. A signed piece by the man at the head of that line reads almost as a founding document for the whole tradition.

For a stretch of years the sword's whereabouts were unknown, and it was listed on the Agency for Cultural Affairs' public register of missing designated properties. It has since been found and accounted for, which is why it can again be discussed as a located, intact work rather than a lost one.

What to Look For

The construction is ryo-shinogi-zukuri: two cutting edges meeting at a central spine, with a shinogi ridge raised on each side, so the cross-section is mirror-symmetrical instead of backed like a tachi. The official description notes a body that is fairly broad for its length, thick through the spine, with a point that spreads rather than narrowing to a fine tip. In the hand it would read as solid and weighted.

Look into the steel and the forging shows itame, a wood-grain figure, with swirls of burl-like mokume worked through it. The temper line keeps to a largely straight course broken by small undulations, the restrained kind of hardening tied to the older Bizen manner rather than the flamboyant clove-shaped patterns Osafune later grew famous for. Grain and temper together place the blade among the strong work of the Kamakura period.

Because a ken is symmetrical, it asks for a different kind of looking than a curved sword. There is no single graceful arc to trace. The eye travels down both edges at once, checking that the left answers the right.

Where to See Mitsutada's Work Today

This particular ken is privately owned and is not on regular public display, so seeing the blade itself is not something a traveller can plan around. Anyone who wants to understand what Mitsutada and his school achieved has better routes to it.

The natural destination is the Bizen Osafune Sword Museum in Setouchi, Okayama, built on the ground where the school once worked. It is Japan's only public museum devoted to swords, showing around forty blades at a time with Bizen work at the center and several changes of display through the year. A working forge on the same site lets visitors watch smiths fold and hammer steel, and a traditional forging demonstration is held on the second Sunday of each month. The Tokyo National Museum also holds a katana attributed to Mitsutada, shown in rotation rather than on permanent view.