To be honest, I'm a bit afraid of A. P.'s potential reaction to this news, but starting last year, fruit-flavoured Kit Kats have been released in Hokkaido. So far, I have sampled banana, pineapple, and strawberry. To the best of my knowledge, these flavours are still not to be found anywhere else in the world.

Delicious. But proof of further conspiracy against ignorant American consumers?

As Hokkaido is barely even part of Japan, and only so because tourists come from the rest of Japan, there seems to be only one URL on the entire internet with pertinent information. (At least in English. I dare not search for information on fruit-flavoured Kit Kats in Japanese.) Here it is.
Banana Kit Kat, Say It Ain't So.