Launching in October 2017, the Fist of the Blue Sky: Regenesis manga serves as a continuation to the Fist of the Blue Sky manga. Hiroyuki Yatsu writes and Hideki Tsuji provides the art, and the latter confirmed that the draft layouts have been completed for most of what’s left of the manga. All he has to do now is draft the final two chapters.
While this doesn’t give us an exact idea of how much is left of the manga—these chapters may be drafted well in advance, so they could be ahead of schedule—it does signal that the series is closer to ending.
Crunchyroll streams both seasons of the anime adaptation and describes it like so:
The year is 193X in Shanghai, the city where lives are valued least. The rivalry between the two factions controlling the underworld, the Green Gang and Red Flower Gang, reaches its peak and is nearing its end with a Green Gang victory. The individuals responsible for the revival of the Green Gang, Kasumi Kenshiro and Yu-Ling, are enjoying a brief rest from the conflict. Meanwhile, in Harbin, Liu Fei-yan and Erika Arendt are carefully transporting something. With their course set for Shanghai, they are headed to meet French intelligence officer Charles de Guise.
Prior to Regenesis, the Fist of the Blue Sky manga delivered a prequel to Fist of the North Star, complete with art by original North Star manga artist Tetsuo Hara and writing by original author Buronson alongside Nobuhiko Horie. It ran from 2001 to 2010 and was collected in 22 volumes.
In related news, a brand new Fist of the North Star anime was recently revealed to celebrate the series’ 40th anniversary.