Japan first-quarter GDP revised up, boosted by leap year gain

By Stanley White TOKYO (Reuters) - Japan's economy grew faster than initially estimated in the first quarter as capital spending fell less than was first reported, but worries remain over slow consumer spending and weak exports. "The upward revision is very slight, and when you exclude the impact of leap year growth is not that strong," said Shuji Tonouchi, senior fixed income strategist at Mitsubishi UFJ Morgan Stanley Securities. Prime Minister Shinzo Abe said he will announce additional econo