USDJPY is exiting a 4-month long triangle, so the price action should soon become more fast-paced. It's reasonable to expect the downtrend in USDJPY to happen together with the sell-off in stocks. The downtrend in USDJPY is likely to run in parallel with the collapse of the EUR, so shorting EURJPY may be a good idea too. (See attached a longer-term view of USDJPY).