noun
den of thieves; brothel; red-light district
Refers to a dangerous or disreputable area associated with crime, prostitution, or vice. Often used in a literary or dramatic context.
その界隈は昔、魔街と呼ばれていた。
That neighborhood was once called a den of thieves.
小説の舞台は、魔街の奥深くにある酒場だ。
The novel is set in a tavern deep in the red-light district.