** Shares of Ono Pharmaceutical Co Ltd 4528.T , which makes
cancer drug Opdivo, plunge 15 pct to more than 2-month low of
2,852.5 yen as rival drugmaker's success weighs
** Drugmaker Merck & Co Inc's MRK.N blockbuster drug
succeeds pivotal lung cancer trial urn:newsml:reuters.com:*:nL3N1RM3VO
** MRK says late-stage study of its drug Keytruda met main
goal of helping previously untreated lung cancer patients live
longer
** As of last close, Ono Pharma stock had risen 28.5 pct
this year
** About 10.76 mln shares have been traded as of 0430 GMT,
compared with their 30-day moving average of 2.45 mln shares a
day
((Reuters
Messaging:ayai.tomisawa.thomsonreuters.com@reuters.net))