JPYUSD is following an upward channel. FOMC and BOPJ did not intervene. JPYUSD has been much higher in the past and may do so now. Note tntsunrise and others gave a buy signal on this last turn up.
I am updating this post to give credit to blue43 (https://www.tradingview.com/chart/USDJPY/Sg1gFon8-USDJPY-0-618-TOUCHED-RESISTANCE-AREA/) and tntsunrise (https://www.tradingview.com/chart/USDJPY/or6rDngE-USDJPY-Short-Zone/). See their links on this to see how they identified the most recent buy zone. I actually bought US 30 year treasuries because I didn't know if the BOJ would initiate a major QE or not. The trading volumes for JPYUSD are massive. Note, if you were a Japanese (or any) retiree holding Yen, the US stock market would already be crashing. I always thought that markets drove currencies. For JPN225 (and all markets), I wonder if it is the other way around. For the savvy Japanese investors who are good at timing their market and moving between the Yen and JPN225, they are doing very well compared to the US. I was trading futures the morning of the BOJ decision and there was extremely high futures volatility ahead of and with the BOJ decision.
For anyone considering entering this trade, please check blue43 and tntsunrise ideas. It may turn bearish at this time. This is a daily chart and does not help with optimal entry and exit points.