Seinosuke MITSUYA was born on 4th of October in Osaka, Japan . At the age of 14, he began the study of Martial Arts (Karate and Kobudo) under the guidance of Master Teruo HAYASHI (1924 - 2004).

He graduated from the “Kansai Gaikokugo Daigaku” University of Osaka. During his university education, MITSUYA collaborated with Master Teruo HAYASHI (1924 - 2004) as his assistant in his central dojo, teaching karate and kobudo.
 
In Japan is a great achievement to become a captain of the Martial Arts club of the University; Hanshi MITSUYA became not only the coptain of his univerity club but he was managing and coordinating several other university clubs in Osaka.
The 70's where very difficult years in Japan but Hanshi MITSUYA showed already his talent and dedication as a great leader and martial artist.
He received many special lessons from Soke HAYASHI (1924 - 2004) to perfect his skills and to be prepared to diffuse the original Hayashi-ha Karate-do and Kobu-do all around the world.

Hanshi MITSUYA has demonstrated his very high quality, refined and effective techniques in many locations around the world by seminar, meetings and presentations for almost 40 years and he is still continuing today with ever renewed spirit!
He was the first official representative of Japan Karate-do “Hayashi-ha Shito-ryu Kai” and Kobudo "Kenshinryu" organizations outside Japan and his unique task made him the principal exponent of these styles presenting them all around the world. This role was instrumental for the great success and expansion of this school of traditional Japanese Martial Arts, that in early times was still almost unknown.

In the early 70’s Seinosuke MITSUYA relocated to Seattle, USA, demostrating traditional Japanese Karate-Do and Kobu-Do in many events and teaching the dojos in the States of Oregon and Washington.

In 1973, he moved to Europe, where, until now, he has made himself and the original Hayashi-ha style (Karate-Do & Kobu-Do) known in Sweden, France, Italy, Spain, Germany, England, Switzerland, Finland, Greece, Hungary, in South America in Venezuela and in Africa in the Ivory Coast and Botswana.

Grand Master MITSUYA holds the rank of 8th Dan and title of Hanshi given by Soke HAYASHI Teruo (1924 - 2004). He is one of the highest ranks in Japan Karate-Do “Hayashi-ha Shito-ryu Kai” as well as its top representative travelling and teaching (Karate-Do & Kobu-Do) worldwide.

Today Hanshi MITSUYA is continuing his work through the MITSUYA-KAI International organization dedicating himself in the teaching and diffusion all around the world of traditional Japanese Karate-Do and Kobu-Do of the original Hayashi-ha style.