Move over, Greece.
From Zero Hedge (5/15/2012):
Sovereign debt to GDP: Japan is the only country over 200%, and set to go higher after the March 11, 2011 triple disaster.
Sovereign debt interest payment to government revenues: Japan is the only country over 20%.
Japan's sovereign debt to GDP ratio, since 1980: 45-degree angle since early 1990s, after the real estate bubble burst.
Sovereign debt to government revenues: Japan looks to be about 1,900%. Greece comes in second, with about 400%.
Zero Hedge cites the source as: Harvard Business School, 9-212-091, Hayman Capital Management