you can always change the region of your shop channel. just install the shop channel for the region you'd like. This will how ever delete your current shop channel account. you will loose what ever wii points you currently have and i think it will erase what ever titles you have already purchased. not 100% on the last part. it's been a few years since i turned my shop channel japanese. and to play the games your going to need to use either priiloader or start patch to enable region free channels.