 Koretoshi Maruyama

Koretoshi Maruyama (born 5 October 1936) is an aikido instructor and founder of Aikido Yuishinkai (合氣道唯心会), he was an uchi deshi of aikido founder Morihei Ueshiba and also a student of Koichi Tohei.Koretoshi Maruyama first began studying aikido at the Aikikai Hombu Dojo in 1956 as well as training at the Keio University Aikido Club.