- Chiharu Niiyama
- Yuri Tachibana (BS Digital Q reporter)
- Ryûdô Uzaki
- SDF Adm. Taizô Tachibana
- Masahiro Kobayashi
- Teruaki Takeda (science writer)
- Shirô Sano
- Haruki Kadokura (Yuri's boss)
- Takashi Nishina
- AD Aki Maruo
- Kaho Minami
- SDF Intelligence Capt. Kumi Emori
- Shin'ya Ôwada
- SDF Lt. Gen. Katsumasa Mikumo
- Kunio Murai
- SDF HQ Secretary Masato Hinogaki
- Hiroyuki Watanabe
- Yutaka Hirose
- Shingo Katsurayama
- SDF Intelligence Maj. Tokihiko Kobayakawa
- Toshikazu Fukawa
- Adjutant Miyashita
- Masahiko Tsugawa
- Chief Cabinet Secretary
- Hideyo Amamoto
- Prof. Hirotoshi Isayama the Prophet
- Nobuaki Kakuda
- Commanding Sector officer
- Takafumi Matsuo
- Mototsu Station police officer
- Kazuko Katô
- Schoolleacher
- Katsuo Nakamura
- Yaizu harbor fisherman
- Kôichi Ueda
- Village headman
- Yôichi Atsumi
- Man in hostel bathroom
- Takehiro Murata
- Cameo appearance (jet fighter pilot)
- Yoshimasa Kondô
- Eyewitness
- Kaoru Okunuki
- Eyewitness
- Okina Hanasaka
- Ropeway guest
- Hinako Saeki
- Ropeway guest
- Yukijirô Hotaru
- Cameo appearance (suicidal man)
- Masaya Takahashi
- Cameo appearance (bicycle shop owner)
- Chiu Yan
- Yokohama street hippie (speaking Chinese)
- Masaaki Tezuka
- Cameo appearance (SDF officer)
- Mizuki Kanno
- Cameo appearance (communications soldier)
- Kôichi Kawakita
- Cameo appearance (SDF officer)
- Tarô Ishida
- SDF officer
- Ryô Kase
- Fisher
- Ai Maeda
- Cameo appearance (Twin girl in Yokohama)
- Aki Maeda
- Cameo appearance (Twin girl in Yokohama)
- Tomoe Shinohara
- Teenage girl at hostel and hospital
- Kôichi Yamadera
- TV studio producer
- Mizuho Yoshida
- Gojira / Bystander in Yokohama (behind twin girls)
- Akira Ohashi
- Kingugidora / Man in Yaizu harbor office
- Rie Ãta
- Baragon / Woman in Yaizu harbor office
- Masahiro Noguchi
- Motosu Police Station Police Officer
- Takashi Tsukamoto
- College Student
- David Thomas
- Unidentified Character