First you need Any Region Changer. You would need version 1.1b
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1. Erase your shop account (Wii serial number is needed)
Erasing your shop channel will delete all bought stuff so make sure you want to do this.
This step is indispensable if you allready used the wii shop channel.

1.1 Select the Wii Shop Channel from the Main Menu.

1.2. Select Start.

1.3. From the Wii Shop Channel menu, select Settings.

1.4. Select Remove Wii Shop Channel Account.

1.5. Select Remove to confirm the removal.


2. Start AnyRegion Changer (ARC) and set the shop channel region to 1=JPN and mark the EULA as read

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- I suggest to set Language Setting to English, because if you are using Spanish the language on the wii will be japanese and probably you cant understand anything

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3. Save settings and exit ARC

4. Go back to Wii menu, start your shop channel and voila its in JPN shop!!


Now you can buy/add Wii points easylly for your JPN shop channel!!

I take no credit for this tut.