When is a ghost not a ghost?

When it is, in fact, graffiti attributed to a 23-year old Australian tourist who this past May went on a spree of tagging the word "ghost" at various locations throughout the city of Kyoto, including bridges along the Kamo River, on street signage and inside a McDonald's restaurant.

He also left the trail for all to see online, posted to his Instagram account, before he was apprehended by police.