青線地帯
あおせんちたい
area around a red-light district where illegal prostitution occurred (marked on police maps by a blue line; 1940s-1956)
赤線地帯 se lit あかせんちたい (akasenchitai) et signifie quartier rouge.
あかせんちたい
akasenchitai
あおせんちたい
area around a red-light district where illegal prostitution occurred (marked on police maps by a blue line; 1940s-1956)
doldrums
red belt
infrared rays
infrared data communication
infrared lamp
infrared sensor
infrared photography
infrared interface
red-light district
non-legal public road (denoted by a red line on cadastral maps; sometimes no longer physically existing)
loss-making line (railway, bus, etc.)