Morihei Ueshiba

Morihei Ueshiba (植芝 盛平, Ueshiba Morihei?, December 14, 1883–April 26, 1969) was a famous martial artist and founder of the Japanese martial art of aikido. He is often referred to as Kaiso (開祖?), meaning "founder", or Ōsensei, "Great Teacher".

Reference: http://en.wikipedia.org/wiki/Morihei_Ueshiba
See also: http://www.youtube.com/watch?v=yxxb2ctulEs&feature=related