|“This is Oni land. As long as we stay on our side, they will stay on theirs.”|
|— Faith in "Two Lies, One Truth"|
Oni land is the territory in the Realm of Oni and Dragons, where the Oni built strongholds and resided long ago. A divider made of dragon skulls piked on sticks separated it from the rest of the land. As long as the other inhabitants of the realm stayed on their side, the Oni would stay in theirs. It was deserted centuries ago for unknown reasons.
- The dragon skulls on the sticks resemble the heads of the Ultra Dragon.