The Ninja Warriors (ニンジャウォーリアーズ) is a side-scrolling hack 'n slash action game originally released in 1988 for Arcades. The game was distributed both in dedicated cabinets, and as a conversion kit for Darius cabinets, utilizing the same three-screen monitor setup used by Darius.

It was ported to the PC Engine in 1989, in the same year in Europe to the Amiga, Amstrad CPC, Atari ST, ZX Spectrum, Commodore 64 in 1990, and Mega CD in 1993. In 2006, it was distributed as a mobile phone application game to three mobile phone carriers, EZ appli, i-appli, and V appli. In 2008, it was distributed to mobile phone carriers in a form that was faithful to the arcade version. The PC Engine version was released on i-revo as software for Windows in 2006, and was released on the Wii Virtual Console in 2008. The Arcade version was released on Arcade Archives for PlayStation 4 in 2017 and Nintendo Switch in 2019.

In 1994 the game received a remake for the Super NES titled The Ninja Warriors Again.