Japan and North Korea had a "secret" meeting in Vietnam in July without informing the United States, the Washington Post reported Tuesday.The talks were held between Shigeru Kitamura, head of Japan's Cabinet Intelligence and Research Office, and a senior North Korean official in charge of reunification, Kim Song Hye, the newspaper said.Senior U.S. officials expressed irritation that Japan was not forthright about the meeting, despite Washington's near-constant updates to Tokyo on its dealings with North Korea, it said.Officials in Tokyo have acknowledged that to negotiate the return of Japa…READ FULL ARTICLE