Synopsis
Mining engineer Shigeru investigates the disappearance and death of his fellow coworkers when prehistoric nymphs are discovered emerging from the mines. After an attack on the local village, Shigeru heads deeper into the mines only to make a more horrifying discovery in the form a prehistoric flying creature. Soon a second monster appears as the two converge in Fukuoka.
Cast

Kenji Sahara
Shigeru Kawamura

Yumi Shirakawa
Kiyo

Akihiko Hirata
Professor Kyuichiro Kashiwagi

Minosuke Yamada
Mining Chief Osaki

Yoshibumi Tajima
Izeki
Akio Kobori
Police Chief Nishimura
Mitsuo Tsuda
Staff Officer Takeuchi
Ren Imaizumi
Sunagawa
Jun'ichirō Mukai
Military officer

Rinsaku Ogata
Goro
Ichirō Chiba
Chief of Police
Tsurue Ichimanji
Haru
Tateo Kawasaki
Tsunesan
Kanta Kisaragi
Suteyan

Tsuruko Mano
Osumi
Jirô Suzukawa
Yoshizo
Yasuhiro Shigenobu
Sabu

Keiji Sakakida
Tahei

Ichirō Nakatani
Senkichi
Kiyoshi Takagi
Dr. Minakami (uncredited)

Fuyuki Murakami
Professor Minami (uncredited)
Mitsuo Matsumoto
Professor Isokawa (uncredited)

Takuzō Kumagai
Policeman Tashiro (uncredited)

Yasuhisa Tsutsumi
Imamura, F-86F pilot (uncredited)
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