The Japanese cast includes Kei Kobayashi as Kenichi, Yuka Imoto as Tima, Junpei Takiguchi as Dr. Laughton, Kouki Okada as Rock, Kousei Tomita as Shunsaku Ban and Tarô Ishida as Duke Red.
Working from the original manga by Osamu Tezuka, Yasuhiro Nakura handled the character designs and served as the chief animation director.
The cast for that includes Brianne Siddall as Kenichi, Rebecca Forstadt as Tima, Jamieson K Price as Duke Red, Michael Reisz as Rock, Simon Prescott as Dr. Laughton and Tony Pope as Shunsaku Ban.