Submersion of Japan is a Japanese disaster film directed by Shirō Moritani in 1973. It is based on the 1973 novel Japan Sinks by Sakyo Komatsu. The film stars Keiju Kobayashi, Hiroshi Fujioka and Ayum

Haruo Nakajima was a Japanese actor and stuntman. A pioneer of suit acting, he is best known for playing Godzilla in 12 consecutive films, starting from the original Godzilla until Godzilla vs. Gigan.