Toshio Furukawa as Ataru Moroboshi (voice)

Fumi Hirano as Lum (voice)

Akira Kamiya as Shutaro Mendo (voice)

Issei Futamata as Akira (voice)

Shinji Nomura as Hiroyuki (voice)

Mugihito as Father Mendo (voice)

Saeko Shimazu as Shinobu Miyake (voice)

Sumi Shimamoto as Asuka Mizunokoji (voice)

Bin Shimada as Tobimaro Mizunokoji (voice)

Kenichi Ogata as Father Moroboshi (voice)

Natsumi Sakuma as Mother Moroboshi (voice)

Michihiro Ikemizu as Onsen-Mark (voice)

Tomomichi Nishimura as Principal (voice)

Kazue Komiya as Ran (voice)

Machiko Washio as Sakura (voice)

Ichiro Nagai as Sakuranbou (voice)

Shigeru Chiba as Satoshi (voice)

Akira Murayama as Kosuke Shirai (voice)

Kazuko Sugiyama as Ten (voice)