What does the United States have in common with Japan’s economy? Demographics of an aging population have consequences for both countries. As Japan News reports, National debt hits record high. "Japan’s national debt totaled a record-high ¥1.02 quadrillion as of the end of March, up ¥33.36 trillion from a year earlier, the Finance Ministry said. The central government debt, which increased ¥7.01 trillion from the end of December last year, kept rising mainly due to ballooning social security costs in line with the aging of the population."