Soon enough, a boundary between fantasy and reality shall be formed. With that, it will be the beginning of an isolated world that is called Gensokyo.

And Gensokyo happens to find the oni unnecessary.

The oni are too influential in every way.

One must keep the truth simple in all cases. To be everlasting is to be uncomplicated.

In order to preserve Gensokyo permanently,

things such as incentive and influence are but useless.