Watch Document 72 Hours Season 10 Episode 16 Online

A pebbly beach on Niigata Prefecture's Sea of Japan coast contains pieces of real jade. Some people who come here for a natural treasure hunt find jade right away, others have no luck despite picking through the stones all day. Among the visitors were a family on a trip; regulars who come from far and wide; and a woman whose visits here helped her become more socially outgoing. What is it that lures them so much to this beach? For three days in early summer, we asked the people hunting for treasure at the water's edge.