Ryujin Swords

Katana by Ido Hidetoshi with both 1934 pattern shingunto koshirae and modern martial arts koshirae

Click on any picture for more detail.


Period: Showa, before late 1940-early 1941.

Mei: Ido Hidetoshi; with sho stamp.

Sugata: Shinogi-zukuri, tori-zori, iori-mune.

Overall length: 35.51 inches (902.00 mm).

Nagasa: 27.48 inches (698.00 mm).

Nakago: Ubu, 8.03 inches (204.00 mm), one mekugi-ana, suijikai yasurime, kurijiri nakagojiri.

Kissaki: Chu-kissaki. Boshi uncertain due to WW2 polish.

Moto-haba: 1.26 inches (32.00 mm). Moto-gasane: 0.30 inches (7.50 mm). Saki-haba: 0.80 inches (20.20 mm). Saki-gasane: 0.22 inches (5.60 mm).

Sori: 0.55 inches (14.00 mm).

Hamon: An irregular gunome, possibly with some notare. The hada was almost certainly done by hand in the traditional manner; there is activity in it, though it is rather difficult to see in the photos.

Hada: None seen. There may be a hada there, but I can't guarantee it, and therefore offer it as a non-traditionally made sword. Some blades with sho stamps are most certainly traditionally made, though these are in the minority. If a window polish reveals the presence of a hada, then the buyer has got lucky. The probability though is that this is a half-forged sword that has then been tempered in the traditional manner.

Blade condition: In WW2 polish with some scuffs and nail catchers. No fatal flaws. It will however polish up beautifully, if so required.


Two sets of mounts. The first is a set of martial arts koshirae; iron tsuba, lacquered ito, plain iron fuchi-kashira and sterling silver menuki. The second set of koshirae are unrestored standard 1934 pattern shingunto mounts with a field grade officer's (e.g. a major's) tassel. Both sets of koshirae are in fairly good condition.


Hidetoshi (Hawley HID 195) was a pupil of Fukumoto Amahide. He worked at Amahide's sword factory in Seki, Gifu prefecture, where he made both showato and gendaito. Hidetoshi was rated Chuge-saku and Ge-saku by WW2 sword authorities. See also Slough page 33.

Many of Amahide's Showa period swords were actually made and signed by Hidetoshi acting as a substitute for his teacher (i.e. daisaku daimei). It should also be noted that although Hidetoshi made this sword, it is not shoshinmei, that is, it is not signed by Hidetoshi himself. It has instead been signed on his behalf by another well-known Showa swordsmith, Fukumoto Kanemune, the legitimate son of Amahide. This was fairly standard practice in the Seki sword shops during WW2. Click here and here for swords by Kanemune; compare the mei with the one on this sword.

This is an unrestored, unpretentious showato in good condition that would be excellent for either a martial artist or collector of militaria. Such swords are getting less common these days.