To be sure, its government is a large debtor; its net debt as a share of GDP is one of the highest in the OECD. However, the public debt has been accrued not primarily through wasteful spending or "bridges to nowhere", but because of ageing, says the IMF. Social-security expenditure doubled as a share of GDP between 1990 and 2010 to pay rising pensions and health-care costs. Over the same period tax revenues have shrunk.
Falling tax revenues are a problem. The flip side, though, is that Japan has the lowest tax take of any country in the OECD, at just 17% of GDP. That gives it plenty of room to manoeuvre. Takatoshi Ito, an economist at the University of Tokyo, says increasing the consumption tax by 20 percentage points from its current 5%—putting it at the level of a high-tax European country—would raise ￥50 trillion and immediately wipe out Japan's fiscal deficit.
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