The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
In Japan, watermelons are grown into the shape of a square so they are easier to stack and transport.
108
Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
57
In Japan, more adult diapers are sold than baby diapers.
50
In Japan, it is tradition for husbands to get a monthly allowance from their wives.
6
Japan's capital Tokyo means "Eastern Capital".
1