In Japan, the word "Kit Kat" is similar to the Japanese expression kitto katsu, meaning "certainly win". Kit Kat are therefore often offered as lucky snacks to students before exams. Japanese Kit Kat are also known to be popular souvenirs for tourists. The packaging is sometimes decorated with images of popular tourist sites in Japan, and makes a lovely souvenir to take home. Japanese kit kat advertisements are very popular and also vary with the seasons. The wide variety of flavors not found elsewhere, such as wasabi, sweet potato, strawberry, cheesecake, melon and many others, add to this popularity.