Kachidoki

Kamen Rider Kachidoki (仮面ライダー凱鬼, Kamen Raidā Kachidoki?): A taiko-type Oni who was mentioned briefly in Episode 3 by having defeated the last Yamabiko of 2004 in November that year, in a prefecture called Ogara. This makes him an Oni of the Tōhoku region. His name means "Enjoyment Demon."

Arsenal and techniques
 * Henshin Onsa (変身音叉?): A tuning fork transformation device.
 * Ongekiko Hakuryoku (音撃鼓・白緑?): A taiko buckle.
 * Ongekibō Rokushō (音撃棒・緑勝?): A pair of drum sticks Ongeki weapon.