Oni

Oni (鬼), translated as "demon", "devil" or "ogre", can be referring to one of the following topics:
 * The early tentative title of Nioh.
 * The official codified term for the monstrosities in the Toukiden series.
 * The "dark" energies and entities in the Fengshen Yanyi series.
 * A member of a mystical race in the Harukanaru Toki no Naka de series.

Oni is also the character used in the legendary epithets for Yoshihiro Shimazu, Katsuie Shibata and Hanzō Hattori.