Ryujin Swords

Katana by Monju Yamato school in shirasaya, NBTHK Hozon

Click on any picture for more detail.


Period: This sword was produced circa 1573.

Mei: Mumei

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

Overall length: 35.70 inches (907.00 mm).

Nagasa: 27.24 inches (692.00 mm).

Nakago: O-suriage, 8.46 inches (215.00 mm) with 2.5 mekugi ana. The yasurime are technically katte-sagari, but they are so flat as to almost be kiri.

Kissaki: Chu-kissaki 1.23 inches (31.20 mm), komaru boshi.

Moto-haba: 1.13 inches (28.70 mm). Saki-haba: 0.75 inches (19.10 mm). Moto-gasane: 0.27 inches (6.90 mm). Saki-gasane: 0.18 inches (4.50 mm).

Sori: 0.47 inches (12.00 mm)

Hamon: Suguha, nie-deki with sunagashi and ashi.

Hada: Masame hada and utsuri and chikei in jitetsu.

Blade condition: In good condition and polish, with no fatal flaws, as can be seen in the photographs below.


In shirasaya with brass habaki. The horn elements on the shirasaya have been professionally repaired and photos will be coming shortly.


This was, originally, a very long sword, with at least another 5-6 inches on the nagasa, giving a blade of 32-33 inches long. It is still quite impressive in its shortended form. Presumably it had to be shortened following Tokugawa edicts on the maximum length of swords.