The story
Japan Tennis Association was established as a voluntary organization in the year 1922 as Japanese Tennis Association. In 1980, it was renamed to Japan Tennis Association. In 1923, International Lawn Tennis Federation (the then international governing body of tennis) recognized the Japanese Tennis Association. The United States Lawn Tennis Association (now United States Tennis Association) played a major role in the formation of JTA, Julian Myrick the then president of the USTA and tennis promoter backed the membership of Japanese Tennis Association in the International Lawn Tennis Federation.
From Wikipedia’s article on Japan Tennis Association, shared under CC BY-SA 4.0.4