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First step:
Make a new profile on your xbox 360 console
Second step:
Go to system settings then console settings and change your locale to japan
Third step:
Join Xbox Live and make a new account with any email aslong as it has @jp.com at the end then follow the process from there
Fourth step:
Download the game with the purple dragon and open after downloading
Fith step:
Click on the red bar and write down your 48 hour code!

And thats it everytime you need another 48 hour code just follow them steps and put the code on your desired account aslong as the locale is on japan the code should work!

I Hope Ya'll Like This Tut

Doesn't work anymore I tried but it says invalid maybe all the codes are used up??

wow man how you find this way