Sorry for the delay. The Japanese version is ready!
To which should I attach it?
Excellent! You can't upload it here directly, but you can find a file host (I like catbox) and then link that here. Right on this thread is fine for now. Once I've had a chance to take a look at it, I'll probably give it its own thread too so people can find it easier. Thanks for the hard work, I really appreciate it!