青線

あおせん

[aosen]

Definitions

1.noun (common) (futsuumeishi)

blue line

2.noun (common) (futsuumeishi)

area around a red-light district where illegal prostitution occurred (marked on police maps by a blue line; 1940s-1956)

3.noun (common) (futsuumeishi)

non-legal public waterway (denoted by a blue line on cadastral maps; sometimes no longer physically existing)