Sure, you can defeat the Oni that are coming through the Gatest of Jigoku and stop their nefarious plans here in the regular world. But that will only work for so long. If one wishes to defeat them entirely, you must travel to the Oni's home plane and defeat them there. That's the story behind the Beyond the Gates of the Jigoku expansion for Okko Chronicles that's up on Kickstarter now.
The Red Joker
In the Palace of Mists, oni are working on plans to expand their nefarious goals. To thwart them, the hero Okko and his buddies must infiltrate into the heart of the palace and disrupt their plans. However, can all of the heroes be fully trusted? Is one secretly an oni, themselves? That's what you'll have to figure out in Okko Chronicles, a miniatures board game up on Kickstarter now.