Watermelons usually sit awkwardly and take up a lot of space in a
refrigerator. Also, the traditional oval watermelon was too
difficult to stack. The Japanese solved this by developing the
square watermelon a few years back. Now in a complete twist, comes
the completely opposite problem, the pyramid shaped watermelon. Good
luck stacking these things!
Square watermelons costs around 10,000 yen ($83)
while regular oval watermelon costs $15-$20.