WOW! That is more than a little similar... perhaps though they are good friends... Ayu may have put this in there for them, as a gift... or as a tribute... especially since it wasn't credited in the credits... There's NO way that the Kinki Kid's people could have let this slip if it wasn't for a reason... Gifts usually aren't credited
I mean, this chorus was on the commercial, Ayu would NOT have let the part that was so similar be on TV everyday for them to hear it for sure if she copied
