Kimono Itachi doens't really counter Kakuzu.

Kakuzu would be tanky enough to take early damage from given chakra by Itachi. It's such double-edge sword to play Kimono Itachi against Kakuzu

Once his barrier is on cooldown, even if just 1 round he would heal quite decent and sweep through twice easily.

Itachi only dodges mystery, but Kakuzu can eat through dodge. So nope.