Nestle Japan is mainly recognized for its KitKats, but it has been introducing the Crunch bar to the Japanese market. They didn't sell them as individual bars when I was there, but they sold them as mini bars in large bags. For this reason, I never bought a Nestle crunch bar in Japan as I didn't want to buy an enormous bag of them.
One of the reasons the Crunch brand isn't as well known as KitKats is that Nestle Japan didn't go crazy offering a lot of varieties, though they did offer a green tea variety (which I can still buy here but according to the Nestle Japan web site, it's now "obsolete") and are currently offering a vanilla caramel version.
I used to love Nestle's Crunch bar when I was a kid and it was my second favorite candy bar to see in my trick-or-treat bag (the first was Snickers). Since coming home, I've found that the quality has changed or my tastes have. It's not the thrill it once was.