[Sangetsu]

How long will you be staying in Canada? If it's just a temporary move, you can get a multi-band phone from Softbank or Docomo, and pay for international roaming plan when you travel. I use a Docomo phone, and have found that the roaming rates were not expensive (on my last trip of a few weeks I used the phone 3 or 4 times a week in America, and the calls were free). If you are going to be living in Canada, then don't bother with a Japanese phone, even if you do get it unlocked, the cell system in Canada/America is a decade behind Japan, and almost none of the features on your Japanese phone will work there.