Tsuneo Mori (森 恒夫 Mori Tsuneo, December 6, 1944 – January 1, 1973) was a Japanese radical leftist. He was born in Osaka and entered the Osaka City University. After some members of the Red Army were arrested by the Japanese police while he escaped from them, several members of the group went to North Korea with Japan Airlines Flight 351 and some formed the Japanese Red Army. He eventually became the leader of the United Red Army. Along with Hiroko Nagata, he allegedly killed 12 members and he was arrested in February 1972. He committed suicide by hanging in his cell in Tokyo on January 1, 1973.