Today, a commercial for the game surfaced on the interwebs. View here:
I think the narrator says something like: "This is the record of the miracle of passionate men. That moving feeling! Ryu ga Gotoku" ... or something like that.
And then, at the end, Kazuma is all, "I'll use my body to show you," although a better translation might be, "Talk to the fists," then bam pow!