In fact, the back of the box still credits Kenji Yamamoto for the music.
So I've prepared a little video showcasing this error from start to finish, just so that the potential buyer beware of FUNi's mistakes and doesn't get swindled like I did.
Sorry that you have to sit through a bit of fluff, I uploaded it directly from my phone and made a point not to edit it just to prove that I did not mess with it at all and that this mismatch is 100% real.
Also, here's a picture of the Kenji Yamamoto credit in case you can't see it in the video.
Let me know your thoughts and be careful out there.