Some candies develop cult followings, and others never really catch on. This is the true story of why the Kit Kat bar is so popular in Japan.
Japan's KitKat craze: It's gone gourmet
In Japan they have gourmet Kit Kat shops. : r/mildlyinteresting
In Japan, the Kit Kat Isn't Just a Chocolate. It's an Obsession. - The New York Times
The Japanese KitKat obsessionand 300 great reasons to learn more - Lexis Japan
kit kat Experiencing Japan
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Japan's KitKat craze: It's gone gourmet
Japanese KitKats are now smaller because 'people are worried about calorie and sugar