What modern Japanese martial art was developed by Morihei Ueshiba, often referred to as"the founder" "Kaiso" or "Ōsensei"?
Morihei Ueshiba: Morihei Ueshiba (植芝 盛平 , Ueshiba Morihei , December 14, 1883 – April 26, 1969) was a martial artist and founder of the Japanese martial art of Aikido.
i don't know