The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The first foreigner to become a samurai was an African slave.
26
The Japanese, on average, are the shortest people.
320
The Gate Tower Building skyscraper in Japan has a highway passing through its fifth, sixth and seventh floors.
7
Most streets in Japan do not have names.
6