[Nyororin]

Even after living here 10 years, I think I have only once spotted a square watermelon... And it was in a display advertising a store, not really on sale.

In general, the fruit usually is quite good. When I say "greenhouse" in reference to Japan, I probably should use "plastic sheet house" as it`s a more accurate term. The stuff is grown outside, just shielded from the more extreme weather by a thin vinyl sheet tent like thing.