Hi Marina !! TVC (Tokyo Vegans Club) really awaits your stay in Japan !!
I'm sure restaurants and shops would be more friendly to vegans by 2012 (I hope...). But unfortunatelly, there're not so many vegan friendly restaurants yet. Most Japanese don't even know the word "vegan".
Still, vegans are increasing especially in the younger generation. You can find many online shops that sell vegan/vegetarian foods. If you were to cook at home, you don't need to worry about the meal. Soy products, like Tofu or Natto, are very cheap here!
Also, most of vegans living in Tokyo are Gaijins (foreigners) as yourself. You could easily find English speaking vegans at the meet-up's such as "The Tokyo Vegan Meetup Group" and parties !!
Hi, my friend and I are both vegan. We want to relocate to Japan around 2012 can someone give us some advice on how to shop and stay vegetarian, and if there are local people who support this movement. Thanks