Godzilla vs. Megalon

Katsuhiko Sasaki

Inventor Goro Ibuki

Yutaka Hayashi

Hiroshi Jinkawa

Hiroyuki Kawase

Rokuro 'Roku-chan' Ibuki

Kanta Mori

Japan Special Defense Forces Chief

Kotaro Tomita

Lead Seatopian Agent

Ulf Otsuki

Seatopian Agent

Sakyo Mikami

Truck Driver's Assistant

Fumiyo Ikeda

Man from Unit 1

Robert Dunham

Emperor Antonio of Seatopia

Gentaro Nakajima

Truck Driver

Ralph Jesser

Antonio's Aide (Radio Operator in White)

Shinji Takagi

Godzilla