Lineage
The practical reality of direct-contact striking, and the martial spirit that begins and ends with courtesy. What Masutatsu Oyama left behind was inherited by Noriyasu Hamai, and has now been handed on to President Mika Hamai.
Founder — Noriyasu Hamai
Noriyasu Hamai (1954–2023) was born in Nanao, Ishikawa. In 1972, while a student at Hitotsubashi University, he joined the Kyokushinkaikan Headquarters. He placed highly at the All Japan Championships, and in 1977, with the approval of Sosai Oyama, became Branch Chief of Ishikawa Prefecture, building the Ishikawa Branch into one of the largest in the prefecture. Having raised a great many fighters, he came to be called "Kyokushin's master trainer." In 2006 he founded the Hamai Group and devoted himself to carrying on authentic Kyokushin. He passed away on December 14, 2023.
Supreme Advisor — Shihan Satoshi Yui
Shihan Satoshi Yui (6th dan) has taught at the Kyokushinkaikan Headquarters since 1982 and has a record of international instruction in more than 30 countries. In February 2026 he became Supreme Advisor to the Hamai Group. He currently teaches at Kyokushinkaikan (Rikishakai) Jinshin Dojo in Tachikawa, Tokyo.
More about Shihan Yui ／ Jinshin Dojo website ↗
Dojo Kun
We will train our hearts and bodies for a firm, unshaking spirit.
We will pursue the true meaning of the Martial Way, so that in time our senses may be alert.
With true vigor, we will seek to cultivate a spirit of self-denial.
We will observe the rules of courtesy, respect our superiors, and refrain from violence.
We will follow our religious principles, and never forget the true virtue of humility.
We will look upwards to wisdom and strength, not seeking other desires.
All our lives, through the discipline of Karate, we will seek to fulfill the true meaning of the Kyokushin Way.
Organization — Executive Board
In September 2026 (Reiwa 8), the Executive Board was established and the organization moved to a new structure. Under Supreme Advisor Satoshi Yui and President Mika Hamai, the Vice Presidents, Chief Operating Officer, Senior Advisor and Secretary General each take their part in running the organization.
More about the Executive Board ／ Announcement on the transition to the new structure