Gensokyo is a borderland thought to exist deep in the mountains far away from Japan. Most non-human creatures such as monsters live here, but there are also a few humans living here.
Since there is a strong barrier blocking the outside of Gensokyo, the outside world cannot confirm the existence of Gensokyo, and outsiders are usually unable to enter Gensokyo. However, if a very low probability "divine hidden" event occurs, outsiders may come to Gensokyo. Similarly, it is impossible to confirm what the outside of Gensokyo looks like inside Gensokyo, and ordinary residents cannot leave Gensokyo.
However, youkai or humans with supernatural powers can enter Gensokyo through various means.
Intention: Intention to be added