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Japan's Ocean Postbox: In 1999, a Japanese postmaster sank a working mailbox 33 feet into Susami Bay to attract visitors; by 2018, divers had mailed nearly 38,000 waterproof letters

Rest of World News: Discover Japan's extraordinary underwater postbox in Susami Bay, where nearly 38,000 waterproof postcards have been mailed since its inception in 1999. A unique tourist attraction and Guinness World Record holder, this mailbox transforms a small fishing town into a diving hotspot.

Monday, October 19, 2026

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