The USDJPY has been trading above and below the 100/200 hour MAs today, with the most recent swing being to the downside.
The MAs are converged at 143.29. In the early hours of the New York session, the price extended briefly above that level up to 143.34, but could not sustain any momentum.
The price has since dipped back down below the 143.00 level to a low of 142.85 so far. That low got within 3 pips of the Asian session low at 142.82.
Technically a move to a new session low would open the door toward the Wednesday low at 142.509. Below that is a swing area of recent swing low levels between 142.01 and 142.30 (see red numbered circles). Move below that level and the 38.2% of the move up fom the August 23 low would come into focus at 141.475.
Ultimately if the price cannot get below that level, the sellers are not winning in the medium term.