Japanese RPGs have nice music, don't they? Lots of them have really nice music, and many times the themes are meant specifically to enhance or describe the experience of playing the specific game they're in!
You want to play a game where your character is a genderfluid space hero who flies around in a giant robot in a universe where the Earth has been destroyed? Xenoblade Chronicles X has you covered for all your thematically appropriate musical needs!
Want to play the newest entry in Bamco's venerable action RPG series? Then Tales of Melancholia has you covered! It's got some music too, buddy.
I hear Persona 5 is coming out soon! I haven't got a theme song for that one. Maybe this?
Do you have any JRPG music you really enjoy, any themes you think super fit?