Oni Armor

Oni Armor is a set of samurai-like armo , that gives the user physical power equivalent to an Oni. It was created in early years as a substitute for Oni when their numbers were low. But not just anyone could wear the armor, the user would have to be properly trained.

It was kept at a Kibu shrine owned by Yoshino Kamue, until it was stolen by Kamen Rider Shuki in order to claim a transformation device to assume Oni form. The armor was destroyed by a Koganeōkami used by Kamen Rider Zanki but Shuki had succeeded in taking Kamen Rider Todoroki's Henshin Kigen.

Its only weapon was a katana but the user could also use other abilities that they could already do, e.g. the Firebird Shikigami by Shuki.

Trivia

 * The Oni Armor bears a striking resemblence to Henshin Ninja Arashi, one of Shotaro Ishinomori's characters from the TV show of the same name.