I have searched complains about this and the only thread was labeled as "Closed Concern", but the opening movie of the game is still unsynched with its audio when the JP audio is selected. It is not a matter of lip synch though, the entire audio track is ahead of the movie, making sound effects play in incorrect scenes.

It can be clearly be noticed when Urianger is talking to Y'shtola and even more during Thancred's fight against the Sin Eater, where the blasts and reloading sounds are completely out of place.

This issue happens in the PS4 version of the game.