Kamen Rider Hibiki The Movie: Hibiki & The Seven War Oni (2005)

"Unite, legendary oni warriors. Chronicled in those archives. A heroic battle during the Sengoku era."

When a powerful new Makamou attacks and defeats Hibiki, Asumu dives into Takeshi’s history and discovers a book that details the ancient Oni and a boy sharing his name. As he reads on, he learns of the tensions between humans and Oni as they struggle to stop the Orochi Makamou, but will he discover the key to defeating the new Orochi in the present?