'walking proud' a Kinki rip-off?

[Coelacanth]

I was pointed out by a friend that the chorus of Ayu's 'walking proud' sounds a lot like the chorus of this song by Kinki Kids. It's very interesting how similar the vocal melody is, and in my opinion it is very similar...

Here is the chorus of the Kinki Kids song.

Looks like Ayu needs to find some other composers/arrangers, she's looking like a copy-cat lately.