| Minezaki Kenichi | Takano Urara |
| Tachibana Hiromi | Hayashibara Megumi |
| Asaoka Shinobu | Amano Yuri |
| Shirogane Tarou | Shimada Bin |
| Hiyama Youji | Shinohara Akemi |
| Ishida Gorou | Uemura Noriko |
| Kouzu Erika | Hayashibara Megumi |
| Kojima Takako (Professor) | Ootani Ikue |
| Osada Shuuzou | Amano Yuri |
| Mushanokouji Saneyasu | Shinohara Akemi |
| Seki Kazutaka (Chobi) | Yanada Mika |
| Mizuhara Yuka (Yuka) | Ootani Ikue |
| Tanabe Kumiko | Takano Urara |
| Yamamoto Harue | Hayashibara Megumi |
| Satou Akemi (Wan (1)) | Shinohara Akemi |
| Satou Harumi (Tsuu (2)) | Yanada Mika |
| Fujiyoshi Masao (Maaboo) | Nitta Sanshirou |
| Ooyama Ikuyo | Uemura Noriko |
| Nakajima Tatsuo | Nitta Sanshirou |
| Yayoi Yuri | Amano Yuri |
| Takagi Toshio | Shimada Bin |
| Houjou Chiyono | Uemura Noriko |
| Kitajima Hiroko | Itou Miki |
| Defence Team Chief Takeda | Nishimura Tomomichi |
| Eldoran | Shimada Bin |
| Kenichi's Father | Aomori Shin |
| Kenichi's Mother | Ootani Ikue |
| Shinobu's Mother | Itou Miki |
| Youji's Father | Yanada Kiyoyuki |
| Youji's Mother | Fukami Rica |
| Youji's Older Brother | Yamazaki Takumi |
| Youji's Older Sister | Ishikawa Etsuko |
| Kikai-shin [Machinery God] | Aomori Shin |
| Haguruma-ou [Gear King] | Sugawara Masashi |
| Giigu | Aomori Shin |
| Denki-ou [Electricity King] | Satou Masaharu |
| Enjin-ou [Engine King] | Sugawara Masashi |
| Girutaabo | Anzai Masahiro |
| Genshi-ou [Atom King] | Yanada Kiyoyuki |
| Maddoshaapu | Makishima Naoki |
| Deddobiimu | Satou Masaharu |
| Kiraawosshaa | Shimaka Yuu |
| Desugoroggu | Yanada Kiyoyuki |
| Debirukyacchaa | Sasaoka Shigezou |
| Oomiya Etsuko | Itou Miki |
