In a way. Although they are not prevalent enough for the civilians to be privy to their existence, they still are active enough to require some supervision. My family seals and contains demons all over Japan, as well as recording everything that we have encountered with every generation.

[He shrugs]

Although you say you have had only a week...as you come from another world, you may have encountered demons that are not in the Hotsuin database. In any case we both benefit from comparing.