Deepest Post Box Underwater

In the serene waters of Susami Bay, Japan, lies a remarkable testament to human ingenuity and a love for the quirky. This unique postal service, situated ten meters beneath the surface, offers an extraordinary way to send a message. It was established in 1999 as an innovative initiative to revitalize tourism in the small fishing town. The idea was conceived by Toshihiko Matsumoto, the then-70-year-old postmaster, who envisioned divers sending mail from the depths of the ocean.

This submerged mailbox quickly gained international attention, earning recognition from the Guinness Book of World Records in 2002 for its impressive depth. To participate in this underwater mailing experience, visitors purchase specially designed waterproof postcards and use oil-based paint markers to ensure their messages withstand the aquatic journey. The act of diving down to post a letter provides a thrilling and memorable experience for many.

The operational logistics of this submerged post box are as fascinating as its existence. A local dive shop owner, often a certified diver, undertakes the task of collecting the mail daily, ensuring that these unique postcards reach their intended recipients on land. Maintaining this underwater fixture is also a regular endeavor; the mailbox is repainted every six months and replaced annually with an old, unused mailbox to keep it in good condition. This blend of practical postal service and adventurous tourism continues to draw visitors, with approximately 1,000 to 1,500 pieces of mail being sent from the depths each year.