Before this KitKat, I had never heard the word "Gianduja" before in my life. Wikipedia tells me that it is "a sweet chocolate containing about 50% hazelnut paste" that is similar to Nutella.
I'm not a huge fan of Nutella, so I was a little wary of this one, but my husband loves the stuff, so he was very excited. This is another KitKat that has more filling and less cracker, but unlike the matcha version, this one worked.
The hazelnut flavor wasn't strong, but it was very pleasant and just strong enough to give the cream a flavor. Both the chocolate coating and the chocolate/hazelnut cream were smooth, rich, and melty. It made for a very pleasant KitKat.
Unlike the matcha version where the green tea flavor was missing, the hazelnut flavor here was just enough. I'm sure I would have liked it more if I was more of a hazelnut lover. My husband really enjoyed it, though.
KitKat Website (Japanese)