Nagaki Mitsuru was born in 1950 in Ehime Prefecture. Nagaki was regarded as having a promising future in judo, which he had worked hard on since his childhood. Later, when he entered the Nihon University, he studied karate under Abe Senseiʼs guidance. From that point onwards, Nagaki has devoted his life to karate. An 8th Dan holder with accuracy of technique, he is also a rare karate expert who got successful result in both Kata and Kumite. His leadership is highly respected in the world of karate, and he has created many world-class karate experts, including world champions. The secret of his teaching method to nurture strong athletes is receiving a great deal of attention not only from karate officials but also from many sports leaders.

He also never fails to practice by himself hard and broke an unprecedented record of winning 27 consecutive master class championships. Nagaki is the Chief Instructor Founder/Director of JSKA HQ and Shihankai member.