[OHayou]

Going further on the point of "depends on individual and company" I believe it depends on the nationality also. I have friends (who are Japanese, Chinese, White) who all work at the same Japanese company (in America) and the Japanese are inherently expected to work longer (and if they leave at 5:00pm receive disapproving looks) while their American counterparts are not expected to do. Maybe it's just this particular company...not sure.

I also deal with a gentlemen who is Japanese, working for a Japanese company, who lives in America who stays until 8pm-9pm at night because he starts receiving emails from Japan at night. I can only assume this is true for employees who work in Japan with their counterpart companies in the United States.