Mind and body unified
Shin Shin Tōitsu Aikidō (心身統一合氣道), widely known as Ki-Aikidō, is the Japanese school of aikido founded by Tōhei Kōichi (藤平光一, 1920–2011). Its name means "aikido with mind and body unified", and it places at the centre of practice the cultivation and extension of ki together with a relaxed coordination of mind and body.
Tōhei and the Aikikai
Tōhei was among the most senior students of the aikido founder Ueshiba Morihei and served for years as the chief instructor of the Aikikai headquarters, doing much to introduce the art abroad, above all in Hawaiʻi and on the American mainland. Convinced that the principles of ki and mind-body unification should be taught first and explicitly, he came to differ with the Aikikai over method.
To unify mind and body, and let ki extend.
The Ki Society
In 1971 Tōhei established the Ki no Kenkyūkai, the Ki Society, and in 1974 he left the Aikikai to teach his own school full time. Shin Shin Tōitsu Aikidō is carried on today by the Ki Society and its affiliated dōjō around the world, its history plainly documented from Tōhei's own career and writings.