Look for 124.00 to hold the line
The USDJPY has moved below the 200hour MA at the 13.875 level,but above the 100 hour MA at 123.526. The pair is moving lower the Yelllen commentary and looks back to the 100 hour MA as I type.
Looking at the hourly chart the trend line support at 123.48 is a key level too. A move below starts to look toward the lows from yesterday Monday at 123.25 and 123.09. Kuroda's comments the other day took the pair all the way to 122.45. He later retracted his comments somewhat.