I wanted to refer everyone to a material posted by Jessie as part of the Conference Committee Member’s (CCM) page. There are many great documents there to download for free, but I wanted to direct you to one I found particularly useful.
It is the Culture and Etiquette and Workplace Relations Handout prepared by Isaac and Will, and presented at the new JET orientation seminar in August of 2011.
If you are having any troubles at work or you want to know a bit more about how to fit in better, please give this doc a good read through. This handout will tell you about cultural differences in the Japanese workplace and how you can improve workplace relations by being sensitive to these differences.