Originally Posted by
nishimark
Overnight bus would be one of the LAST places I'd look for a good night's sleep when dead tired. Good way to save money if you're traveling cheap, but that's about it.
If I'm dead tired I'll sleep no matter what.
The thing is, OP might not be tired arriving. The people who talked about early morning awakening-I find it depends on when you sleep. If you arrive in the evening in Japan, from the US, you might not be able to sleep. You would stay up late. And then sleep during the day.