Direct answer
USD/JPY is likely down because traders are repricing a weaker near-term outcome across one or more primary catalysts. That does not always mean trend failure. It means traders need to distinguish a real breakdown from a routine flush.
Most likely bearish catalysts
US yields
Weakening us yields can pressure USD/JPY and accelerate liquidations.
Bank of Japan policy
Weakening bank of japan policy can pressure USD/JPY and accelerate liquidations.
carry trade demand
Weakening carry trade demand can pressure USD/JPY and accelerate liquidations.
dollar strength
Weakening dollar strength can pressure USD/JPY and accelerate liquidations.
What confirms the selloff
- Confirm the drop is tied to real weakness in us yields instead of a brief flush.
- Check whether the move is spreading across related forex markets.
- Only trust continuation if breakdowns hold after the first fast selloff.