Japan economy minister Amari comment on the Bloomberg :

  • Yen has not reached excessively weak levels

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That's it so far. Nothing further

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OK ... I've picked myself up off the floor after that comment ....

Here is more from Amari, via Reuters:

  • Markets determine what are appropriate forex levels
  • Regardless of whether it's a yen rise or yen fall, forex moves have various effects on economy if the move is rapid