Fist of the Blue Sky (蒼天の拳) is a Japanese manga series written and illustrated by Tetsuo Hara, with plot supervision by Buronson. It was serialized in Weekly Comic Bunch from 2001 to 2010, with the chapters collected into 22 tankōbon volumes by Shinchosha. It is a prequel to the popular 1980s manga Fist of the North Star, which Hara originally illustrated with Buronson writing. Set primarily in Shanghai during the 1930s, the series centers on the 62nd successor of the Hokuto Shinken martial arts style, Kenshiro Kasumi, the namesake and predecessor of Kenshiro from Fist of the North Star. The manga was adapted into a 26-episode anime series that aired on TV Asahi from October 2006 to March 2007.
A continuation of the manga, Sōten no Ken: Re:Genesis (蒼天の拳 RE:GENESIS), written by Hiroyuki Yatsu and illustrated by Hideki Tsuji with the additional involvement of Hara, was serialized between 2017 and 2025 in Monthly Comic Zenon, with the chapters collected into six volumes by Coamix. A 24-episode anime series of the same name aired from April to December 2018, with oversight by Hara.
Plot
The main protagonist of this story is Kenshiro Kasumi, better known as "Yan Wang" or "The King of Hell". Kenshiro is a laid back and chain-smoking Tokyo