Nobuo Kawai (川合伸旺, Kawai Nobuo, 18 April 1932 - 24 June 2006) was a Japanese actor. He is most famous for playing villains and appeared in many jidaigeki and detective television dramas as a guest. He was a member of Yukio Mishima's Roman Gekijo Theatre Company. He died of cerebral infarction on June 24, 2006, at the age of 74.