It took me 6 months to organize all the English voice files, so I have no plans on doing the Japanese files anytime soon. Within the rom itself, all the voice files are just thrown together randomly in a single folder and unlike Xenoblade 3, there's no online chart that lays out how the files are supposed to be grouped together. I just used the files from the Wii version as a template for ordering the files in the Switch version, and then I had to rely on gameplay footage and doing my own playtesting to organize the Future Connected gameplay files.

So if anyone else wants to try to organize the Japanese files, they're welcome to try.