Hacking How to change DRC region?

[Tales117]

Hello,
I have US Wii U console but I wanted to use Japanese firmware so I bought JP Wii U console but I only have US gamepad.

The US console has haxachi+mocha+rednand so I can access sysconfig but it does not give me a permission to change DRC0 language on the gamepad.

I researched about how to switch gamepad region but I could not find clear answer.

Is there any way to do it except using drc-sim?

I will look forward to see good news.

Thank you.