The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
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
Japan is the largest exporter of frog's legs.
114
In Japan, more adult diapers are sold than baby diapers.
50