Agreed, all of these needed words.
This yellow and green V-shaped symbol is pretty well known around the world as far as Japanese symbols go. It even has its own emoji (š°) that people often use to mark a beginner.
Never heard of this, If I saw this on a car I'd assume the person works for the library.


I would assume they can get away with not adding text because of limited immigration. How are people not brought up in Japan supposed to know what all these symbols mean.
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