Antique Japanese Muromachi Katana Sword, Ō-suriage Mumei with Gunome Hamon, Gold Shishi Fuchi and Red and Black Lacquer Saya

• Signature (Mei): Mumei (無銘) — unsigned
• Period: Kotō — late Muromachi period
• Attribution: No shinsa paper
• Registration (Tōroku-shō): Iwate Prefecture No. 26385, issued 17 July 1981 (Shōwa 56)
• Mounting: Complete katana koshirae — red and black lacquer saya, round iron tsuba with gold and silver dot inlay, shakudō nanako fuchi with gold shishi, teal silk ito over honey-toned same
• Blade Length (Nagasa): 69.9 cm
• Curvature (Sori): 0.8 cm — shallow, the original curve reduced by the shortening
• Mekugi-ana: 3
• Nakago: Ō-suriage, flat-cut end, dark even patina
• Shape (Sugata): Shinogi-zukuri, iori-mune, chū-kissaki
• Jihada: Tight ko-itame, dark and closely worked
• Hamon: Regular gunome in nioi-deki, with a tight nioiguchi, even from the machi to the monouchi
• Bōshi: Midare-komi, faint in the present polish
• Habaki: Single-piece silver-coloured habaki, engraved on both faces

A Kotō katana of the late Muromachi period, ō-suriage and mumei: shortened at the tang long ago, with the smith's signature lost in the process. The blade measures 69.9 cm of nagasa with 0.8 cm of sori and carries three mekugi-ana. It comes in complete koshirae, and the temper line reads clearly from end to end.

The dating is written into the sword itself. Blades made from the Edo period onward were forged to the length they were meant to be worn at, so they are rarely cut down; the swords that get shortened are the older ones, made for a different way of fighting. Three mekugi-ana say the same thing from another angle — this blade was refitted at least twice after it left the forge. The shallow 0.8 cm of sori is not an Edo trait here but a consequence of that shortening: the deepest part of the original curve sat in the steel that was cut away at the base.

The hamon settles the question. It is a regular gunome — evenly spaced, evenly sized rounded heads repeating without hesitation the whole length of the ha — worked in nioi-deki with a tight, controlled nioiguchi. That disciplined, repeating temper over a tight, dark ko-itame is the hallmark of the late Muromachi workshops, the ones supplying a country at war and judged on how well their swords cut rather than on how much activity they could show off in the steel. Into the kissaki the bōshi runs midare-komi, faint under the present polish, and the point is the one area where the surface has gone tired.

The nakago is dark and evenly patinated, cut flat at the end, with no trace of a mei and the black speckling at the habaki-moto that comes of centuries in and out of mounts. This is a sword that was carried, shortened, remounted and kept — and it has been in continuous registration in Japan since 1981.

Koshirae Details

The mounting is a complete, matched katana koshirae, and it is genuinely handsome. The saya is lacquered in two registers: a bright, glossy vermilion red section at the koiguchi end running back to a band of black, then black lacquer for the length of the scabbard, worn through along the ridges to a silvery underlayer and, in places, to the red beneath. The kojiri is bare at the very tip where the lacquer has gone, exposing the honoki core. A thick, flat-plaited black sageo is tied at the kurikata.

The tsuba is an iron plate, near-round with a raised rim, cut with two large hitsu-ana and carrying a deep brown-black patina over a granular forged skin. Around the seppa-dai, above and below, radiating stalks of grass are chiselled into the iron, and scattered across them are small inlaid dots of gold, silver and white metal — turn the guard in the light and the effect is dew caught on grass. Two pairs of copper seppa seat the plate.

The fuchi is the best piece on the sword: shakudō with a fine nanako ground, framed in a milled copper border, carrying shishi in high-relief gold — lion-dogs with curled manes and flame tails, bounding across the dark field. The kashira answers in a silvered alloy with its own nanako ground, engraved with cloud forms and touched with a small gilt accent.

The tsuka is wrapped in teal silk ito, hineri-maki, over full panels of honey-coloured same with large, well-raised nodes, and carries menuki in dark patinated soft metal with worn gilding, worked as scrolling plant forms. The habaki is a single-piece collar in silver-coloured metal and, unusually for a plain collar, it is engraved on both faces — a flowering plant on one side, bamboo leaves on the other.

Reading an Unsigned Late Muromachi Blade

What can be said about the maker has to come out of the steel, because the tang no longer carries his name. Three things are legible. The hamon is a regular, tightly spaced gunome in nioi-deki — a controlled pattern that has to be laid down in clay at an even width and an even interval before the blade ever touches the water. The jihada is a tight ko-itame, dark and hard rather than bright and airy. And the sugata, once the shortening is accounted for, is that of a practical fighting sword with a compact chū-kissaki.

Taken together that is the workmanship of the late Muromachi production centres — the large provincial schools that armed the Sengoku wars. It is not the profile of an Edo blade, and the shortening and the three mekugi-ana point the same way.

What we will not do is put a name on it. No paper accompanies this sword, so we claim no smith, no school and no province. Several plausible labels suggest themselves and plenty of sellers would pick one; an unpapered attribution is worth nothing at resale, and we will not price one in.

That leaves a clean proposition. A full-length Kotō katana, ō-suriage and mumei, with a legible hamon, a sound tang and a complete period mounting, priced as an unattributed blade. Whatever a shinsa panel might one day say about it is upside that comes with the sword rather than something you are paying for today.

Muromachi Swords and the Shortening of Old Blades

The late Muromachi period was the busiest era in the history of Japanese swordmaking, and the reason is grim: the country spent most of the sixteenth century at war with itself. Demand ran ahead of anything the old master-and-apprentice model could supply, and the great provincial centres — Mino above all, with Bizen close behind — organised themselves to meet it. The swords that came out of that system were judged on cutting ability and reliability, and their temper lines show it: controlled, repeating patterns in nioi-deki laid over hard, tight, dark steel. Exactly what this blade shows.

The same century changed how swords were worn, and that is why so many old blades are unsigned today. Through the Kamakura and Nanbokuchō eras the tachi was slung edge-down from the belt and built long. From the late Muromachi period the uchigatana took over — worn edge-up through the sash, drawn and cut in a single motion, and most effective at a shorter, handier length.

Blades were therefore cut down at the tang to suit the new wear and the new fighting. The process is suriage; when enough length is removed to destroy the original signature it is ō-suriage. It was never vandalism. A good blade was expensive and worth adapting, and the work was done by professionals who reshaped the tang, cut a fresh mekugi-ana and returned the sword to service. The signature was collateral damage.

What is offered here is the result of that history, intact. A 69.9 cm Kotō katana of the late Muromachi period, ō-suriage and mumei with three mekugi-ana, showing a disciplined regular gunome hamon over a tight dark ko-itame, mounted in a red and black lacquer saya with a dew-and-grass iron tsuba, a gold shishi fuchi and a double-engraved silver habaki, and registered in Iwate Prefecture since 1981.