Many varieties of Kit Kat have existed, either permanently or as limited editions, such as those sold to commemorate festivals such as St. Valentine's Day.[citation needed] In Japan, Nestlé has introduced over 200 different flavours since 2000,[28] including ginger ale, soy sauce, creme brulee, green tea, and banana.[29] The flavours are designed to appeal to younger buyers,[30] and are often bought as good-luck gifts as the brand name echoes the Japanese phrase "Kitto Katsu", roughly translating as "surely win.