Surumail: postcard made from squid
Residents of the coastal town of Susami in Wakayama prefecture love the sea and the post office so much that the town once installed a mailbox on the ocean floor for scuba divers. Now, further evidence of this powerful sea/mail love comes in the form of Surumail edible postcards made from squid.
Link to an article with image of postcard. Humans are weird. Japanese doubly so.