The first foreigner to become a samurai was an African slave.
26
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
Japanese schools do not have proms.
-21
In Japan, watermelons are grown into the shape of a square so they are easier to stack and transport.
108
In Japan, gambling is illegal. However, they circumvent the law by giving out prizes instead of cash, which the winner can then sell back to the establishment for cash.
-3