 Toho continued their tradition of casting actors from their science  fiction films of the 1950s and 1960s. The character of Yoshino  Yoshizawa is played by Yuriko Hoshi who had previously starred as  Yoka in _Gojira tai Mosura (1964)_ (qv) and as Naoko (a completely  different character) in the sequel  _San daikaiju: Chikyu saidai no kessen (1964)_ (qv).