It is a place to see when you go to Kumamoto in Aso-shi (or at least for people like me who are in the Kantō). https://4travel.jp/dm_shisetsu/11372926
It is like in the anime (that I never watched haha), and if you go there at the right time it should look like that:
this territory is moderated
I’m embarrassed to say that I lived in Kumamoto for two years but have never heard of this. Thanks for enlightening me! 😘
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