(Captain America Comics 006, 1941)
Comics history seems to have taken the Fang as a Japanese agent but I'm pretty sure that as written he's a Chinese American gang boss who's working for the Japanese against the Chinese government. Either way, he's your basic pulp holdover Asian gang boss with swarms of fanatical hatchet-man and a pronounced lack of humanity down to his namesake fangs. Part of me always wants to skip guys like this but they're just as much a part of comic book history as the Big Wheel or the Hypno Hustler.
EDIT: Just noticed that he wasn't even actually technically hired by the Japanese! His employer was "an Asiatic aggressor nation" - Marvel seems to be a bit less inclined to name and shame them than they were the Nazis.
