Hello, I'm a Japanese playing on a Japanese DC.
Recently, I have seen a lot of English-speaking people playing musical instruments on Japanese DCs in violation of the Terms of Service.
So my question is, when I un-play the instrument, the terms of service are displayed.
Have you read the terms of service properly?

It says that you are not allowed to play any music other than the music specified in FF14.
This is because it is an infringement of copyright and will not only prevent you from playing your instrument, but will also cause serious damage to the game FF14 itself.

I know that most of you who are discussing on this forum are playing on DC in NA, but I warn you from an isolated island in Asia.

Translated with www.DeepL.com/Translator (free version)