Let me correct DaiOni on a few bits of bad advice ... (no offence)
You've got to be kidding to find a R32 GTR for 50万, if you do find one for that price, it's probably been in accidents, has no shakken, high miles, etc, etc.. after the repair and such, it should run around the 100 mark.
Also, 10万 for R32 shakken would be a dream come true. That price is like shakken for a Kei-car, I haven't done my shakken yet but, my friend just did his last week, and he paid 30万 for his car which is just barely under the 2000cc displacement mark. expect to pay more than that for sure.
anyways, Frio do you know where you will be living in Tokyo? Does your employer station you somewhere, or can you pick where ever?