downloading JP DLC for region free game

[forte]

I wanted to download the arrange track for ESCHATOS
http://marketplace.xbox.com/ja-JP/Product/ESCHATOS/66acd000-77fe-1000-9115-d802515507d1?nosplash=1

But I dont know if I login through xbox.com and download the link through my xbla account thats not JP, that it will lock my account? there was a good article that covered this:
http://imas.wikia.com/wiki/Downloadable_Content_for_Idolm@ster_Games#Accessin g_Japanese_DLC
And I understand the bit about the dlc being tied down to the console because I downloaded Akai Katana Shin demo on my J-tag account and I can freely play it on my UK account without issues.

So in short, do I need to upload some MS points onto my j-tag account to be able to download the dlc and then play it on my normal UK account?

[Leo_A]

You need a Japanese account and Japanese Microsoft points to purchase it (Or have a valid credit card linked to a Japanese address).

[forte]

thanks for the reply. I plan to buy some digital points from Play asia but, the cheapest they got is the 1400 points for £18. any cheaper then that?