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.

• 
  Haruyasu Noguchi
• 
  Masaru Konuma
• 
  Hiroshi Hashimoto
• 
  Isao Hayashi

• 
  Tamio Kawachi
  Hiroshi Kurosaki
• 
  Yōko Yamamoto
  Itoko Koyanagi
• 
  Yuji Okada
  Daize Tonooka
• 
  Kōji Wada
  Mashida
• 
  Tatsuya Fuji
  George Inoue
• 
  Keisuke Inoue
  President Funazu
• 
  Zenji Yamada
  Captain of the Kamome-maru
• 
  Bumon Kahara
  Elder
• 
  Kōtarō Sugie
  Reporter #1
• 
  Saburo Hiromatsu
  Hosoda
• 
  Toshinosuke Nagao
  Cmdr. Riku
• 
  Masaru Kamiyama
  The Professor
• 
  Kokan Katsura
  Saburo Hayashi
• 
  Shirō Oshimi
  Oyama
• 
  Yoko Oyanagi
  Aihara
• 
  Sanpei Mine
  Islander 1
• 
  Takashi Koshiba
  Reporter 2
• 
  Kensuke Tamai
  Islander 2
• 
  Minoru Sato
  Reporter 3
• 
  Seiji Matsuoka
  Islander 3