 As this film was made during the big boom of "manzai" (Japanese  comic dialogue), most of the characters voices were played by  popular manzai acts from Osaka. For example, Tetsu and his friend  Mitsuru were played by Norio Nishikawa (qv) and Yoshio Kamigata,  and Tetsus parents were played by Utako Kyo (qv) and  Keisuke Ootori (qv).