may be you once again try to sign up for a amex in japan
http://www.matsui.co.jp/affiliated/amex/
this card if you register through this link, will give you a free green or gold amex for the first year.
now the nice thing about that card, you will earn 2MR points for 100yen you spent on that card. (for the first year)
this is a 12month double points promo, and you can move your canadian MR points to the japanese MR card.
you will be able to transfer your points to ANA, JAL Thai etc etc.
dp