French fries have been declared off-limits to the women, but they still give in to cravings

A craving for fast food presents few obstacles to most people, but for Japan's dainty, doll-like geishas, it calls for a daring undercover operation - and a cunning disguise.

While strictly taboo for a geisha to be seen munching French fries, some "geiko" - as they are known in the ancient city of Kyoto - and their young "maiko" apprentices have hatched a clever plan to avoid detection.