harvesting coral is a tradition in koichi. i hope what i'm trying to do will help keep it going. >> reporter: the people in koichi are turning to artificial breeding to ensure the survival of their industry. but what they learn could also help preserve a species. >>> let turn to markets now. just a refresher that wall street staged another rally with the dow jones industrial average hitting a fresh record high. investors there largely shrugging off the result of italy's referendum. in tokyo shares opened in the positive tracking gains in the u.s. as well as european union markets. the nikkei 225 up .7%, above 18,400. shares across most sectors are gaining, especially exporters like electronicsmakers. they're being supported by overnight weakness in the yen. the dollar has come off from the overnight high at the upper 114 yen level. right now the pair in the mid 113 yen levels. the euro though has bounced back against the dollar. it is at 1.07 on the upper end. that's a three-week high. on monday following italy's resounding re