Weltraumbestien

Kenji Sahara

Joji Atsumi

Yumi Shirakawa

Etsuko Shiraishi

Akihiko Hirata

Ryoichi Shiraishi

Momoko Kôchi

Hiroko Iwamoto

Yoshio Tsuchiya

Leader of the Mysterians

志村喬

Dr. Tanjiro Adachi

Yoshio Kosugi

Cmdr. Sugimoto

Susumu Fujita

Gen. Morita

Fuyuki Murakami

Dr. Nobu Kawanami

Yutaka Sada

Police Capt. Miyamoto

Tetsu Nakamura

Dr. Koda

Harold Conway

Dr. De Gracia

Heihachirō Ōkawa

Person at Board Meeting

Tadao Nakamaru

1st. Lt. Yamamoto

Akio Kusama

Police Station Chief Togawa

Shin Ōtomo

Policeman Kawada

Rinsaku Ogata

Policeman Ogata

Mitsuo Tsuda

Person at Defense Meeting

Senkichi Ōmura

Doomed Villager

Haruya Katō

Doomed Villager

Shōichi Hirose

Detective in Etsuko's house

Keiichirô Katsumoto

Detective

Katsumi Tezuka

Mysterian

Haruo Nakajima

Giant Robot [Script name: Moguera]

Ikio Sawamura

Sachio Sakai

Gen Shimizu

Yasuhisa Tsutsumi

Jun Tazaki

Hideo Shibuya

Yoshifumi Tajima

Hisaya Ito

Army Capt. Seki

Sōji Ubukata

Dr. Noda

George Furness

Dr. Svenson

Ren Imaizumi

Adachi's Assistant Hayami

Rikkie Sanjô

Etsuko's mother

Hideo Saeki

Gen. Emoto

Takuzō Kumagai

Colonel Ito

Takeo Oikawa

Announcer on TV

Kamayuki Tsubono

Defense Meeting Attendee

Yasuhiro Shigenobu

Doomed villager

Eisuke Nakanishi

Detective in Etsuko's house

Jirô Mitsuaki

Detective

Ryûtarô Amami

Policeman

Saburô Kadowaki

Policeman

Masayoshi Kawabe

Policeman

Mitsuo Matsumoto

Newspaper Reporter

Hideo Unagami

Mysterian