Hi,
there are many threads on this forum about people wanting to move to Japan, and how to find a job, a visa for people who really want to go to Japan.
However, a large number of expats are actually assigned to Japan as part of their normal career in multi-national companies. They usually do not have to worry about the visa, and about material issues. However, this does not mean they have it easy, and Japan can be a major carrier breaker, especially for managers that are brilliant in the West.
I was lucky enough to be one of those expats in the Japanese subsidiary of and anglo-saxon group. I wrote a few thoughts about key to success in Japan
there, that may be of some use to others.
I would be glad to hear about your experience too, and any comments about what I wrote.