There is a old japanese sweet candy shop, the brand name is "ghost rearing candy 幽霊子育飴".
The candy is origined by old folk ghost story. One night, when the owner is closing his candy shop, a sickly look beautiful women comes and buy only one candy for one coin. After that she comes everynight, the owner is mystified and follows her returning way. She goes enter the temple graveyard and disappeared at a new burial. He hears the baby crying float out under the burial. He surprised to get temple priest up, and they dig up the burial. Then, a baby is sucking a candy beside the dead women. She bore a baby after dead and became a ghost to rear him. The baby is adopted the temple and became a consummate priest.
The cache is hidden very simple way.