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Kage-ryū (陰流) is a traditional school (koryū) of swordsmanship (kenjutsu) founded by Aizu Hyūga-no-Kami Iko (c. 1452–1538) in c. 1490. This school is also sometimes called Aizu Kage-ryū after the name of its founder. The founder was also known as Aizu Ikōsai Hisatada, and his surname is sometimes written as "Aisu" instead of "Aizu".
|Founder||Aizu Hyūga-no-Kami Iko (c.1452–1538)|
|Period founded||Sengoku period (mid-15th century–mid-17th century)|
|Yagyū Shinkage-ryū • Kashima Shinden Jikishinkage-ryū • Oishi Shinkage-ryū Kenjutsu|
Aizu had two primary students, his son Aizu Koshichiro, and Kamiizumi Hidetsugu. Kamiizumi Hidetsugu would go on to teach Kage-ryū to his son Kamiizumi Ise-no-Kami Nobutsuna, a famous swordsman and founder of Shinkage-ryū (新陰流) (which would be renamed Yagyū Shinkage-ryū by Nobutsuna's equally famous student Yagyū Sekishūsai Muneyoshi.
Today, the Kage-ryū of Aizu Hyūga-no-Kami Iko exists only through its influence of later schools of swordsmanship, such as Yagyū Shinkage-ryū and Kashima Shinden Jikishinkage-ryū, and the many schools that they in turn influenced.