Bokosuka Wars is a 1983 action-strategy role-playing video game created by Koji Sumii and published by ASCII for the Sharp X1 personal computer, followed by ports to the MSX, FM-7, NEC PC-6001, NEC PC-8801 and NEC PC-9801 computer platforms, as well as an altered version released for the Nintendo Famicom console and later the Virtual Console service. It revolves around a king who must lead an army in phalanx formation across a battlefield in real-time against overwhelming enemy forces while freeing and recruiting soldiers along the way, with each unit able to gain experience and level up through battle. The player must make sure that the leader stays alive, until the army reaches the enemy castle to defeat the leader of the opposing forces.
The game was responsible for laying the foundations for the tactical role-playing game genre, or the "simulation RPG" genre as it is known in Japan, with its blend of role-playing and strategy game elements. The game has also been described as an early example of an action role-playing game, an early prototype real-time strategy game, and a unique reverse tower defense game. In its time, the game was a major success in Japan.