Japanese PM Yukio Hatoyama resigns amid Okinawa row Page last updated at 1:55 GMT, Wednesday, 2 June 2010 2:55 UK BBC News Online Yukio Hatoyama had been in power for just eight months Japanese Prime Minister Yukio Hatoyama has announced his resignation. The move comes as his ruling party struggles to revive its chances in an election expected in July. Mr Hatoyama has been under pressure after failing to fulfil an election pledge to move a controversial US base from the island of Okinawa. He has been in power for just eight months, but polls suggest he has been losing popularity in recent months. There have been questions about Mr Hatoyama's leadership for months, the BBC's Roland Buerk reports from Tokyo. But pressure on him intensified after Japan issued a joint statement with the US last week agreeing to keep an unpopular American air base on the southern island of Okinawa, our correspondent says. That broke a pledge the prime minister had made to move it off the island, or even out of Japan, during the campaign for last year's election. That election, in which his Democratic Party of Japan (DPJ) won a landslide victory, was only the second time since World War II that the country's Liberal Democratic Party had not retained power. Over the weekend, the Social Democratic Party (SDP) left the governing coalition because of the issue.