Issey Takahashi

as Rohan Kishibe

as Rohan Kishibe

as Ultraman (voice)

as Kogoro Katsura

as Yūsaku Fukuhara

as Tetsuo Kitamura

as Koji Hashida

as Kippei Koide

as Kaito Sada

as Takashi Hayashida

as Takashi Hayashida

as Ryu Yasuda : Ministry of Education, Culture, Sports, Science and Technology, Research / Promotion Bureau Director

as Hideki Saji (singer of Tetrapod Melon Tea)

as Takechan

as Yôji

as Young Ryunosuke

as Sekiguchi

as Ikeda Senpai

as Seiji Amasawa (voice)

as Classmate (voice)