Hi again! I'm so happy to see this thread has been staying informative and
If anyone is moving to the Kansai region, I highly recommend joining the "Vegan Kansai Meetup Group" (as vegbobi suggested)! http://www.meetup.com/vegan-kansai/
The group is a mix of native Japanese and expats that are vegan/vegetarian/just interested in vegan food, and so far everyone seems really friendly and extremely passionate about veg-living! I was even contacted by a man (who also saw me on the Osaka AJET facebook page) that teaches Japanese to JETs--turns out he will be teaching my Japanese language course in Osaka and he is vegan
! He will even be at my welcome party in August when I first get to town... what an amazing coincidence!
I also joined "Animal Lovers Kansai" (which organizes trips to vegan restaurants, among other things) and cannot wait to get involved with them once I'm there: http://www.meetup.com/Animal-Lovers-Kansai/
If you're not in the Kansai region, don't worry! There are definitely resources out there for you to stay connected and supported by other veg people in Japan. You are not alone.