Known as Exam Hell, school entrance exams are notoriously stressful in Japan, but students in their droves are turning to what they believe is one very lucky charm - a bar of Kit Kat.

As well as being a favourite lunchtime snack, students are now bringing the Nestlé chocolate bar into the exam room because the phrase "kitto katsu" means, "If I try, I will win."

Japan also enjoys a wide range of alternative Kit Kat flavours not seen elsewhere. The latest to hit the sweet shelves is green tea  "macha" flavour, which follows other unusual taste translations such as banana and lemon cheesecake.