Hokuto Shinken
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 professor who is secretly the successor of the deadly Chinese assassin martial art Hokuto Shinken. He travels to Shanghai after hearing that his Triad friend Pan Guang-Lin and love interest Pan Yu-Ling are in trouble.