About Yuishinkai:

- The birth of Yuishinkai
- Founder's Philosophy
- Founder's Motto
- The Chief Instructor

- Photo Album

  The birth of Yuishinkai


Koretoshi Maruyama was born in Nihonbashi, Tokyo, on October 5, 1936. A graduate of the Economics Department of Keio University, he entered the familly business, Maruyama Manufacturing. Having been interested in the martial arts from his Middle School years, he took up Judo and earned a black belt as well as participating in Rikidozan School of Professional Wrestling, Weight lifting and boxing.

In the spring of his third year of college, he entered the Aikikai, as well as the Keio University Aikido Cluband found in Aikido, a martial art which did not depend on strength, and taught the right attitude of mind.

In 1967 he became a full time professional Aikido instructor, under the tutelage of the founder of Aikido, Morihei Ueshiba.

In 1972 he became the Chief Instructor of the Ki no Kenkyukai, founded in September of 1971 by Koichi Tohei Sensei, who granted Maruyama Sensei the rank of 8th-dan.

From 1977 he studied with Haruchika Noguchi Sensei how to heal and help people with Ki and use Ki in daily life. At the same time, he also studied the psychology of Zen from the Zen Priest Shogen Munou, from whom he learned how to use the mind positively.

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1992 – 2002 Koretoshi Maruyama (pictured left) spent 10 years in seclusion at a zen temple developing his studies on the mind.  2002 saw the return of sensei Maruyama to Aikido and the creation of Aikido Yuishinkai