Apparently fans were "begging" the studio to keep the Japanese dialogue as an optional bonus. The game is based off the Japanese manga.
Fist of the North Star's action is very close to that of Dynasty Warriors where you mash through scores of enemies on the battlefield. It releases on Xbox 360 and PS3 this autumn. We play as a bare chested, weird handed, unflinching martial arts killer.
Expect lots of combo induced gore and spurts of blood - thanks Japan!
Source: Eurogamer