- Kenji Sahara
- Joji Atsumi
- Yumi Shirakawa
- Etsuko Shiraishi
- Momoko Kôchi
- Hiroko Iwamoto
- Akihiko Hirata
- Ryoichi Shiraishi
- Takashi Shimura
- Dr. Tanjiro Adachi
- Susumu Fujita
- Gen. Morita
- Hisaya Itô
- Capt. Seki
- Yoshio Kosugi
- Cmdr. Sugimoto
- Fuyuki Murakami
- Dr. Nobu Kawanami
- Yoshio Tsuchiya
- Leader of the Mysterians
- Minosuke Yamada
- Hamamoto - Secretary of Defense
- Tetsu Nakamura
- Dr. Koda
- Heihachirô Ôkawa
- Person at Board Meeting
- Takeo Oikawa
- Announcer on TV
- Haruya Katô
- Doomed Villager
- Senkichi Ãmura
- Doomed Villager
- Harold Conway
- Dr. DeGracia
- Yutaka Sada
- Police Capt. Miyamoto
- Hideo Mihara
- Gen. Emoto
- Rikie Sanjô
- Etsuko's mother
- Sôji Ubukata
- Dr. Noda
- Mitsuo Tsuda
- Defense Representative at meeting
- Ren Imaizumi
- Adachi's Assistant Hayami
- Shin Ãtomo
- Kawada - Policeman
- Takuzô Kumagai
- Col. Ito
- Akio Kusama
- Togawa - Chief of Police Station
- Shôichi Hirose
- Detective in Etsuko's House
- Tadao Nakamaru
- 1st Lt. Yamamoto
- Kamayuki Tsubono
- Person at Defense Meeting / Policeman on phone
- Rinsaku Ogata
- Ogata - Policeman
- Yasuhiro Shigenobu
- Doomed Villager
- George Furness
- Dr. Svenson
- Byron Morrow
- General - American Version)
- Haruo Nakajima
- Moguera
- Katsumi Tezuka
- Mysterian
- Hiroshi Akitsu
- UFO Witness
- Sabel Jameel
- Foreign Reporter
- Yoshio Katsube
- Villager / Scientist / Reporter / Mysterians Executive / Self-Defense Force member
- Eisaburo Komatsu
- Cameraman
- Keiji Sakakida
- Defense Force Executive
- Haruya Sakamoto
- Reporter
- Kôichi Satô
- Defense Force Member
- Masaaki Tachibana
- Science Scholar / Refugee / Self-Defense Force Member
- Hideo Unagami
- The Mysterian
- Enver Altenbay
- Reporter
- Ryûtarô Amami
- Policeman
- Kazuo Hinata
- No. 2 Elevator Crew Member
- Saburô Kadowaki
- Policeman
- Keiichirô Katsumoto
- Detective
- Masayoshi Kawabe
- Policeman
- Mitsuo Matsumoto
- Newspaper Reporter
- Jirô Mitsuaki
- Detective
- Eisuke Nakanishi
- Detective in Etsuko's House
- William Ross
- Journalist
