Black Densuke watermelon in Japan sells for a record $ 6,125 . A marine products dealer in Japan plunked down a record $ 6,125 ( ¥650,000 ) Friday for a black Densuke watermelon -- grown only on the northern Japanese island of Hokkaido . Nearly 18-pound melon is grown only on the northern Japanese island of Hokkaido . Hide Caption Buyer says he wants to support local agriculture , according to an official .
Black Densuke watermelon in Japan sells for a record $ 6,125 . Nearly 18-pound melon is grown only on the northern Japanese island of Hokkaido . Hide Caption Buyer says he wants to support local agriculture , according to an official .