Known for its "gimme a break" jingle and slogan, Kit Kat has become one of the most popular chocolate candy bars in the United States. However, Kit Kats are even more popular in Japan, as they are the best-selling candy bar in the country.

Kit Kats are pronounced "kitto katto" in Japanese, which resembles the phrase "kitto katsu," meaning "good luck," so the chocolate candy bar has come to be a sign of good luck. According to Tokyo Weekender, people in Japan gift Kit Kats as "good luck" symbols, especially "before university entrance exams."

Because of the popularity of the treat, there are more than 300 different varieties of Kit Kats throughout the country of Japan. Among the flavors are purple sweet potato, creamy wasabi, miso, cherry blossom, Japanese plum, pistachio and raspberry, yuzu, and many more.