I saw on Foodbeast that in Japan, you can find
Wasabi-flavored Kit Kat--who knew?
According to Wikipedia, there are also flavors in Japan such as Aloe Vera, Apple, Beet, Black Tea, Blueberry, Butter, Cantaloupe, Cheese, Cucumber, English Mustard, Ginger Ale, Iced Tea, Kiwifruit, Mango, Miso, Passion fruit, Pepper, Pickled Plum, Pumpkin, Soy Sauce, Sweet Potato, Tiramisu, Wine and many more.
Wow--are we missing out!