Shirai was born in
Nagasaki, Japan on 31 July 1937. He started learning karate in 1956, three years after seeing a promotional video of the
Japan Karate Association (JKA) at
Komazawa University. In 1962, he won both the
kata and the
kumite championships of the JKA, thereby becoming one of those receiving the title 'Grand Champion'. After a world trip to promote karate together with
Taiji Kase,
Hirokazu Kanazawa, and
Keinosuke Enoeda to Europe, South Africa, and the United States of America, he settled in
Milan, Italy in 1965. Under his tutelage the Italian karate flourished and many titles went to his students. Shirai died home in Milan on 9 October 2024, at the age of 87. ==Goshindo==