Toshio Furukawa

as Ataru Moroboshi (voice)

Fumi Hirano

as Lum (voice)

Akira Kamiya

as Shutaro Mendo (voice)

Yo Inoue

as Carla (voice)

Saeko Shimazu

as Shinobu (voice)

Kazuko Sugiyama

as Ten (voice)

Machiko Washio

as Sakura (voice)

Ichiro Nagai

as Cherry (voice)

Noriko Ohara

as Oyuki (voice)

Yuko Mita

as Benten (voice)

Kazue Komiya

as Ran (voice)

Tessyo Genda

as Rei (voice)

Hirotaka Suzuoki

as Inaba (voice)

Mayumi Tanaka

as Ryuunosuke (voice)

Masahiro Anzai

as Ryuunosuke's Father (voice)

Michihiro Ikemizu

as Onsen-Mark (voice)

Kaneto Shiozawa

as Rupa (voice)

Koichi Kitamura

as Lum's Great-grandfather (voice)

Ritsuo Sawa

as Lum's Father (voice)

Reiko Yamada

as Lum's Mother (voice)

Kenichi Ogata

as Ataru's Father / Upa (voice)

Natsumi Sakuma

as Ataru's Mother (voice)

Shigeru Chiba

as Megane (voice)

Akira Murayama

as Perm (voice)

Issei Futamata

as Chibi (voice)

Shinji Nomura

as Kakugari (voice)

Tomomichi Nishimura

as Principal (voice)

Tomohiro Nishimura

as Kotatsu Neko (voice)