* Kazuki Yoshihiro as Hoshihiko Mizuki
* Sumi Shimamoto as Haruka Urashima
* Tomoki Ohmi as Genta Urashima
* Yumi Kuroda as Rinko Urashima
* Chikao Ohtsuka as Professor Ginta Torokawa
* Toshiko Fujita as Chiyo Torokawa
* Kenichi Ogata as Hideo Mizuki
* Yuko Natori as Akemi Mizuki
* Daisuke Gouri as Takeshi Mizuki
* Tomoko Ikuta as Akane Mizuki
* Naoko Watanabe as Yuko Mizuki
* Masaya Onosaka as Susumu Mizuki
* Kumiko Watanabe as Yuka Mizuki
* Ai Orikasa as Keiko Mizuki