TOKYO — More than 40,000 Japanese people are aged 100 or over, up 10 percent over last year, a government survey showed on Friday. The report is the latest reminder of the economic problems facing the world’s most rapidly aging country. Of the 40,399 citizens in their 100s, 87 percent are women, the Health and Welfare Ministry said. An aging population that is also forecast to shrink is among the challenges facing new prime minister Yukio Hatoyama and his Democratic Party, elected in a landslide last month. A smaller workforce will have to shoulder the burden of ballooning pension and healthcare requirements. Just over three people of working age now support each elderly person, but in 50 years the ratio will be closer to one to one. Hatoyama’s Democrats have pledged to standardize the pension system with a minimum of 70,000 yen ($765) per month for those who had low incomes or lacked sufficient contributions to qualify for a pension. Japan’s centenarian numbers rank it second in the world behind the United States, which now has more than 96,000, according to U.S. Census Bureau estimates. But the U.S. population is more than double that of […]