Shinobi Legions, known in Europe as Shinobi X, is a 1995 hack and slash platform game developed and published by Sega for the Sega Saturn. The player controls the ninja Sho on his quest to prevent his brother Kazuma from finding and using an ultimate ninjitsu technique that could end the world.

The game sees players go through a series of side-scrolling platforming stages, each containing numerous enemies and obstacles that the player must contend with, helpful optional power-ups such as life-ups and temporary abilities that help the player progress and a boss battle, which the player finds at the end of a level and then must defeat. The gameplay is largely retained from prior Shinobi games, however there is a higher emphasis on the usage of a katana for offense and defense against enemies and full-motion video cutscenes are used in the game to progress the ongoing plot.

The game has received mixed reviews from critics, with praise for the game's digitized sprite graphics and new defensive moves, but criticism for the FMV cut scenes and lack of any major gameplay changes from previous entries of the series.