Yakuza 6 Memories "For Faith"

Today I stopped across something interesting. In the original Yakuza 4 release they cut the Voice from the For Faith Intro (Like most of the times the intros get changed). But if I play the Yakuza 6 Demo and choose Memories on the Main Menu the Yakuza 4 Recap has the original For Faith playing in the background. So it was no Copyright issue back the time Yakuza 4 released? Or is Yakuza 4 old enough and the Song can be used freely now?
I'm not sure about this, so what do you think about it?

.