Japan ruling bloc election win could be too big for markets to swallow

By Linda Sieg TOKYO (Reuters) - A big win for Japan's prime minister and his allies in a Sunday election would raise concern that the government will switch its focus from a stuttering economy to revising the post-war, pacifist constitution to ease constraints on the military. Prime Minister Shinzo Abe's coalition is in no danger of losing power in the election for half the 242-seat upper house, a vote he is portraying as a referendum on his "Abenomics" recipe of hyper-easy monetary policy, spen