The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The Gate Tower Building skyscraper in Japan has a highway passing through its fifth, sixth and seventh floors.
7
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, slurping loudly while eating noodles shows that the food is delicious. It's actually considered rude not to slurp!
26