Kit Kat sales rise in Japan

Students in Japan have reportedly caused sales of Kit Kat bars to soar, by adopting them as lucky charms.
The name of the chocolate bar resembles a Japanese expression - "kitto katsu" - used by students to wish each other luck before exams.
The phrase has been translated roughly as: "I hope you will win."
Kit Kat has introduced a range of flavours designed for the famously sweet-toothed Japanese market, including green tea flavour.