Japan"s prime minister backed a U.S. role for a proposed EU-style Asian community on Saturday, telling Southeast Asian leaders Tokyo"s alliance with Washington was at the heart of its diplomacy, Reuters reported. Making a case for an East Asian Community at a summit of Asian leaders in Thailand, Prime Minister Yukio Hatoyama said there should be some U.S. involvement in the bloc, which faces stiff obstacles including Japan"s historic rivalry with China. It was unclear how a U.S. role would work. But the comment may help allay concern in some countries that such a body would ultimately fail by shutting out the world"s biggest economy. Hatoyama may also be trying to defuse U.S.-Japan tension over the long-planned reorganisation of the American military presence in Japan, the first big test of ties between Washington and the new Japanese government. -- SPA