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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.