Men sit in a park in Tokyo, Japan, on Monday, July 8, 2013. The number of Japanese seniors living alone will rise 54 percent to 7.17 million in 2030 from 4.66 million in 2010, according to the National Institute of Population and Social Security Research, set up by the Ministry of Health, Labour and Welfare. To manage the costs stemming from the aging society, the government aims to push back the pension age to 65 from 60 in stages through 2025. Photographer: Kiyoshi Ota/Bloomberg via Getty Images