December 3, 2022
interesting facts

Susami is a very small, rather drab little fishing town in Japan, but it has one curiosity that attracts visitors like a magnet.

What does the average person do when they want to send a postcard? The answer is simple – he probably pops into the nearest post office. But in Susami you can dive to the bottom of the sea to do just that. The idea for the first underwater mailbox came from the mind of Toshihiko Matsumoto, the head of the local post office. Toshihiko wanted to boost tourism in the town, so one day he decided, with the help of Kenji Nakanishi, the head of the diving school, to put a letterbox in the sea – at a depth of 10 metres.

Toshihiko’s underwater mailbox is so real that it’s an official mailbox, and Kenji collects treasures from the mailbox and delivers them to the post office. In this cool way, around 1,000-1,500 postcards are currently delivered each year. Postcards can only be posted at the bottom of the sea in diving gear, of course, so this special mailbox has not only boosted tourism in the town, but also interest in diving. But there’s no need to worry about the integrity of the postcards, as waterproof copies can be bought on the beach and the most beautiful messages are written on them in indelible marker.

This daring idea was also registered in the Guinness Book of World Records in 2002 as the world’s deepest letterbox.

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