Sho Kosugi (???ยท???, Sho Kosugi, born Shoichi Kosugi (?? ?? Kosugi Shoichi) on June 17, 1948) is a Japanese martial artist, actor, filmmaker, and writer with extensive training in Shindo jinen-ryu Karate, Kendo, Judo, Iaido, Kobudo, Aikido and Ninjutsu.
A former All Japan Karate Champion, he gained popularity as an actor during the 1980s, often playing ninjas.
He starred in a trilogy of ninja-themed martial arts films produced by Cannon Films, before earning a starring role in the primetime television series The Master.