Master Koretoshi Maruyama became a full-time professional Aikido instructor under the tutelage of O-sensei in 1967. He was Chief Instructor of Ki No Kenkyukai under Koichi Tohei Sensei for many years, during which time he travelled extensively in North America, Europe, Asia, Australia and New Zealand. Maruyama Sensei established particularly strong ties through long and close associations in Hawaii and Australia.
From July 1991, Maruyama Sensei undertook a ten-year period of intensive mind training in a temple in Saitama Prefecture. Maruyama Sensei received permission from the temple priest to establish Aikido Yuishinkai on 9 May 1996, which he has continued to develop to the present day.
Maruyama Sensei is widely admired and respected as a teacher who has dedicated his life to communicating the benefits of ‘positive mind’ through Aikido training. He has inspired many thousands of people throughout the world over many years.
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