《明日之丈》第 0 季于 1969 年 11 月 06 日首播。

Pilot Episode

《明日之丈》第 1 季于 1970 年 04 月 01 日首播。

某一天，流浪的不良少年矢吹丈突然出现在泪桥。沉迷于酒精的原拳击手丹下段平发现了丈在拳击方面的天赋，但是丈却因为犯了诈骗罪被送到了少管所。在少管所他遇到了宿命的敌人——力石彻，发誓要打倒力石的丈依靠段平“为了明日”而寄给他的记述着拳击练习方法的明信片，在自己的房间里勤勉的练习着。出所后，作为拳击手站上职业拳台的丈以段平的指导为基础，将无防护战法、交叉反击拳作为自己的招牌打法一跃成为了拳击界的宠儿……

《明日之丈》第 2 季于 1980 年 10 月 13 日首播。

Yabuki Joe is left downhearted and hopeless after a certain tragic event. In attempt to put the past behind him, Joe leaves the gym behind and begins wandering. On his travels he comes across the likes of Wolf Kanagushi and Goromaki Gondo, men who unintentionally fan the dying embers inside him, leading him to putting his wanderings to an end. His return home puts Joe back on the path to boxing, but unknown to himself and his trainer, he now suffers deep-set issues holding him back from fighting. In attempt to quell those issues, Carlos Rivera, a world renowned boxer is invited from Venezuela to help Joe recover.