Sokaku Takeda (1860-1943), founder of Daito-ryu Aikijujutsu.
Koichi Tohei (1920-2011), founder of Shin Shin Toitsu Aikido (aka Ki-Aikido) and Ki no Kenkyukai.
Morihei Ueshiba (1883-1969), founder of modern Aikido.
Kenjiro Yoshigasaki (1951-2021), headmaster of Ki-Aikido in Europe and founder of Ki no Kenkyukai Internationale.
Rainer Varis (1955-), founder of Finnish Ki-Aikido and Finnish Ki Federation.
Pekka Salmi, Rainer Varis & Esa Lilja from Finland with Michael Holm of the Ki no Kenkyukai Musubi (2021).