https://www.smh.com.au/world/asia/ja...26-p50c7l.html
"Though the chocolate bar is sold in more than 100 countries, including China, Thailand, India, Russia, the US and Australia, it’s one of Japan’s best-selling chocolate brands and has achieved such a distinctive place in the market that several people in Tokyo told me they thought the Kit Kat was a Japanese product."
This story also includes a full history of the Kit Kat and its origins.