The manga has inspired two television anime in 1970 and 1980, as well as two anime films in 1980 and 1981.
Chiba stated that he started having abnormalities one after another in his heart valve, coronary artery, and throat.
He is perhaps best known for his Ashita no Joe (Tomorrow’s Joe) boxing manga, which ran from 1968 to 1973, and has remained a mainstay in Japanese popular culture for decades.
82-year-old manga creator Tetsuya Chiba revealed in a blog post on Wednesday that he started feeling unwell after summer ended this year, and several days ago he admitted himself to a hospital in Tokyo.