Aisu Ikosai

Japanese martial artist

爱洲移香斋 · 愛洲久忠

Born

1452

Died

1538

Sport

martial arts

Occupation

martial artist

Aisu Iko, a.k.a. Aizu Hyūga-no-Kami Iko, Aisu Hisatada (1452 - 1538) was a Japanese martial artist and the founder of the Kage-ryū school of sword fighting.

Aisu was originally a pirate based in Kumano, who raided Japanese and Chinese shipping and whose travels took him on occasion as far as the Chinese mainland. After suffering a severe shipwreck off Kyushu, of which he was the only survivor, Aisu abandoned his life as a pirate and entered into seclusion at the Udo caves in Miyazaki Prefecture. Here, he purportedly had a dream in which a monkey deity taught him the secrets of swordsmanship. He named the new style he developed the Kage ("Shadow") School, which based its movements on natural phenomena such as wind and waves. Aisu's student, Kamiizumi Nobutsuna, (who also studied with Iko's son Aisu Koshichiro) would later adapt this style into the Shinkage ("New Shadow") school.

After travelling throughout Japan on a martial pilgrimage for some years, Aisu returned to Kyushu, where he died of natural causes.

External links

• Wikipedia
• Wikidata

Facts from Wikidata Q9298982 (CC0); quoted introduction from English Wikipedia (CC BY-SA 4.0). Data retrieved 2026-10-22.

Data: Wikidata (CC0 1.0); Wikipedia (English) (CC BY-SA 4.0). Retrieved 2026-10-22.