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Tatsume ShiutaroRyusaku Hata/ National Kid (episodes 23-39)Shika SaitoDr. MizunoTaku FukushimaThiakoHideya KimuraGoroToru ShimizuKurazoMidori OkadaYukio
Kazuo HaraTomohiro
Isamu YamaguchiDr. Yamada
Ichirô KojimaRyusaku Hata/ National Kid (episodes 1-22)
Kiwako TaichiTaeko Shimura/Naoko Obata
Chiyoko HonmaTsuneko Yamada