The ayakashi world is ruled by eight great yokai called the Hachiyo. After Aoi succeeded in offering hospitality to Matsuba, one of the Hachiyo, the master innkeeper takes her out to the capital of the hidden realm as a reward for her achievement.
This is Youto, the capital 
of the hidden realm.
Esto es Youto,
la capital del Reino Oculto.
C’est la capitale
du Royaume caché, Yôto.
Esta é Youto, a capital do Reino Oculto.