Gappa, the Triphibian Monster

An expedition in the South Pacific lands on a tropical island where the natives worship the mysterious deity Gappa. An earthquake opens up an underground cavern and a baby reptile is discovered inside. The natives warn the foreigners to leave the hatching alone, but they don't listen and take it back to a zoo in Japan. Soon after, moma and papa Gappa start smashing Tokyo looking for their kidnapped child.

• 
  Tamio Kawachi

  Hiroshi Kurosaki
• 
  Yōko Yamamoto

  Itoko Koyanagi
• 
  Kōji Wada

  Mashida
• 
  Tatsuya Fuji

  George Inoue
• 
  Zenji Yamada

  Captain of the Kamome-maru
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  Saburo Hiromatsu

  Hosoda
• 
  Hiroshi Ito

  Reporter 4