Setting
A large lake that sits at the bottom of Mt. Yatsugatake, it is well known for being extremely foggy around noon. Visibility is low and the population of Fairies specifically is high, making it easy to lose your way around here. Youkai associated with water are also uncommonly found here. Although the lake seems really vast, that is merely an illusion, as it would take just under an hour to walk around it. Also, there are reports of absolutely enormous fish residing there, which some anglers take as a challenge. Of course, some never return.