赤あか線せん地ち帯たいあかせんちたいMeanings1nounred-light districthistorical termHistorical term for a red-light district, so called because such areas were marked with a red line on police maps. Refers to the system in place from 1946 to 1958.戦せん後ごの赤あか線せん地ち帯
