Following yesterdays chart and looking through the timeframes. It is possible that the USDJPY is running out of steam for now. There are many reasons here for a pull back:
RSI overbought on 4HR
1HR chart resisting further upsdide
Trump and his general behaviour
Upside rejection developing on daily chart
Approaching end of the month - Profit taking
6 days of straight gains without consolidation or pull back
This is potentially a good combination for a short scalp followed by a longer term long entry setup