USDJPY is trading in a strong bearish trend on weekly. The price keeps following a major falling trend line and we see a sequence of lower lows and lowers highs since January 2017th.
This year we keep being bearish biased. It looks like after a strong rejection from the upper boundary of a major support cluster in March, bears will try to test it again this year.
Remember that the market looks relatively oversold at the moment. For safe entry, I would look for a pullback first and short trade would be strictly initiated on a lower timeframe after a confirmation.