probably has something to do with those oni, am I right?
The "Old Hell Plan" where the oni moved to the Underground...In exchange for being granted inviolable territory, the oni were tasked with keeping the Underground's vengeful spirits in check...Yakumo Yukari-dono excels at dealing with the oni, doesn't she?After all, oni may be symbols of violence, but they do keep their promises.
There are still many who pursue the true oni lifestyle, taking whatever they want through violence.
The reason you've been frequenting the Mountain recently
However, not all of the oni on the Mountain
have agreed to dwell in hiding because they are fed up with humans.