あおせんくいき 青線区域 LinksSentence search for 青線区域Sentence search for あおせんくいきKanji details for 青, 線, 区 and 域Edit in JMdict Noun1. area around a red-light district where illegal prostitution occurred (marked on police maps by a blue line; 1940s-1956)Historical term, See also 青線地帯 Discussions Log in to talk about this word.