I briefly posted on USD/JPY levels:

83.94 – 84.20 USD/JPY are the levels to watch initially from here

While 84.20 is going to be initial selling after the stop run earlier, 84.32/37 appears to be a better place for resistance ahead of the BOJ announcement.

ps. Take care in the period following the BOJ announcement. Its a bit more of a wild card than usual, this one.