Age of War
Age of War is a fast-paced dice game for two to six players, designed by Reiner Knizia and set among the warring states of feudal Japan. In the game, you and your fellow players take on the roles of rival daimyos attempting to unite the Japanese clans by mustering your troops and conquering castles.
Check out Age of War on Board Game Geek.
How to Play from For the Meeple, by the Meeple: