Seigo Yamaguchi was born on 17 April 1924. 8th dan Aikikai. B. Fukuoka Prefecture. Aikikai Shihan. Began training at AIKIKAI HOMBU DOJO c. 1951 and quickly rose through the ranks. Dispatched to Burma in 1958 where he remained for several years. One of the senior instructors at the AIKIKAI HOMBU DOJO, he taught Monday evening classes for several decades. Traveled abroad on numerous occasions, especially to France where he had a large following.

         He died on January the 23rd 1996, aged 72