A team of geophysicists investigating seismic activity on the seafloor discover that the islands of Japan, after suffering from massive volcanic eruptions and earthquakes, will be pulled into the ocean, killing millions.
Submersion of Japan is a Japanese disaster film directed by Shiro Moritani in 1973. It is based on the 1973 novel Japan Sinks by Sakyo Komatsu. The film stars Keiju Kobayashi, Hiroshi Fujioka and Ayumi Ishida.