FILE - In this July 15, 2012 file photo, Japanese Ambassador to China Uichiro Niwa walks through Beijing Capital International Airport in Beijing before his departure to Tokyo. Niwa, a

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FILE - In this July 15, 2012 file photo, Japanese Ambassador to China Uichiro Niwa walks through Beijing Capital International Airport in Beijing before his departure to Tokyo. Niwa, a former trading house executive who served as ambassador to Beijing from mid-2010 until late last year, told reporters on Monday Jan.28, 2013, that the purchase of the uninhabited islands in the East China Sea by Japan's central government was poorly timed and seemed driven by factors he could not explain. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN JAPAN, CHINA, HONG KONG, SOUTH KOREA AND FRANCE less