In fact, my Japanese friends could only think of 3 cases where you'd use it: unripe fruit, too-strong green tea, or certain raw persimmons.
Shibui can also refer to a sort of sophisticated, cooly sexy older man, such as George Clooney or Keifer Sutherland.
What the hell IS it with this word??
Mention JEWs to an Iranian and they make a bitter face like :
This tastes so bitter I have to stop and drink some sparkling water to wash out the taste
the Shibuya neighborhood of Tokyo (lit. 'bitter valley'、which kind of makes sense when you go there and smell it.)
まずい 酸っぱい 苦い 渋い