Susami, a fishing town in Wakayama Prefecture with a population of around 5,000, is in Guinness World Records for having the deepest underwater postbox, at a depth of 10 meters off its coast.
Officially recognized as a mail collection point of the local postal system, 1,000 to 1,500 pieces of mail are dropped into the box each year.
Two hours by express train from the city of Wakayama, Susami has “an incomparably beautiful sea,” Hiroaki Yamatani, 37, manager of a diving shop in the town, said proudly.
The postbox is for use by divers who buy water-resistant postcards at Yamatani’s store and write messages on them with an oil-based paint marker.
An employee of the shop collects the cards once every few days and takes them to the local post office.
The items are then delivered to recipients within a week of being posted.
