Sorry I don't have the answer to your question. But does anyone else think that Maccha KitKat tastes nothing like maccha?
However, there's also the Ito Kyuuemon version of Maccha KitKat which actually has far superior maccha taste to it. It's hard to find those, and I don't remember where I last got one. You're supposed to be able to get those in Kyoto, but I know I ate them elsewhere.