Zen Kajihara (梶原 善, Kajihara Zen, born 25 February 1966 in Okayama), is a Japanese theatre actor. Originally a member of the Tokyo Sunshine Boys theatrical troupe, he now works mainly with the troupe. He is known for being very short in stature, but very noisy and wild on stage, specializing in comedy. He had a problem reading kanji (Chinese characters) and insists that his roles have long, complicated, difficult-to-remember names.