Whither the USD-JPY?

Well it wasn't all that long ago that Claus was asking us when and whether the Japanese authorities would feel the need to intervene to stop the - at that point (9 Nov) - seemingly inexorable rise of the yen against the dollar. Obviously a few short weeks in currency markets are a very long time (which is why playing them has to be such a complicated business I feel), and as we can see from the