Thanks to JC in the comments (here) for the reminder on this

  • The Greek government owes about 11.6 billion yen ... it's a 'Samurai' bond
  • The amount issued was 20 bn yen but the principal has been cut through debt restructuring.
  • Repayment is due today, July 14, on the bond
  • "We have taken all steps required for repaying (the principal)," a senior Greek Finance Ministry official told The Nikkei on Monday

This is a private sector debt. If its missed the ratings agencies will term this a default, whereas the missed IMF payment was not (that was called 'arrears' ... which if you say it in the right way sounds like it could be Talk Like a Pirate Day!)