Based on previous moves down in this same trend channel... We could see anywhere from 500 to over 750 pips! The move to the bottom of the trend channel could take much longer and the better profit play would be to make the most amount of pips in the shortest amount of time which would fall into the 5-7 trading days range.
If you have the time to monitor the 4 hour charts you could maximize your profit by shorting the pull backs with a half position and buying back once it returns to where the pull back began.
This same play is happening on most xxxJPY pairs, but I like the AUDJPY pair only because the pip cost is the same, but the margin requirements are a few dollars less.