A Japanese geologist discovers that dinosaurs still exist in caves beneath the surface of a volcanic lake.
Tsunehiko Watase
Takashi Ashizawa
Shōtarō Hayashi
Akira Taniki
Yōko Koizumi
Akiko Osano
Tomoko Kiyoshima
Junko Sonoda
Fuyukichi Maki
Shohei Muku
Kinji Nakamura
Hideyuki Sakai
Hiroshi Nawa
Masahiko Miyawaki
Masataka Iwao
