Discover the world's deepest postbox, 10 meters underwater in Susami Bay, Japan, where you can send waterproof mail.
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00:00The world's deepest postbox is located in Susami Bay, Japan, and lies 10 meters underwater.
00:11Established in 1999, this unique mailbox promotes Wakayama Prefecture's ancient Kumano Kodo
00:18pilgrimage trail.
00:19Approximately 1,000 to 1,500 pieces of mail are posted annually, mainly waterproof cards
00:27written with oil-based markers.
00:29A local dive shop employee collects the mail, delivering it to recipients within a week.
00:35To combat seawater corrosion, two boxes are alternately used every six months.
00:42This remarkable underwater postbox holds a Guinness World Record for being the deepest.