If you’re in Tokyo, you will be dealing with the Tokyo Regional Immigration Bureau office. This is place you go to pick up and deliver forms and get those all-important stamps in your passport. Unfortunately it’s in Shinagawa, not near the station, which is very inconvenient unless you actually live nearby. The Immigration Information Center inside the Bureau has a useful telephone help line though.
Your first point of contact regarding Japanese visa eligibility is your local Japanese embassy. If you are already in Japan, you may want to contact your home country’s embassy. There are official lists for both of these. These are the places you need to contact for official information about your Japanese work visa and other Japanese immigration issues.
For a while now, this website has contained a bit of information about living and working in Japan. I have now redesigned and updated it, so I hope it’s now easier to use and to find whatever you’re looking for.