Onimusha: Warlords is an action-adventure video game and the first entry of the Onimusha series, released for the PlayStation 2 in 2001.

The game's plot is set in the Sengoku period and focuses on the samurai Samanosuke Akechi who fights against the forces of Nobunaga Oda. After Nobunaga's death in battle, Samanosuke goes on a quest to save Princess Yuki from demons working alongside Nobunaga's forces. The player controls Samanosuke and his partner, a female ninja Kaede, in their fight against demons.