If you are following forexlive (and reaping the rewards of doing so) you'd have seen this from Adam posted just prior to the USD/JPY making like a dropping rock:

The Financial Times recaps the comments (made to the WSJ, the link to the story is in Adam's post):

  • The yen firmed in late New York trading on speculation that US President Donald Trump is eyeing Japan as the next target in his burgeoning global trade war.
  • Wall Street Journal columnist James Freeman said he had spoken to Mr Trump earlier today. In that conversation, he said, Mr Trump described his good relations with the government of Japan, but added: "Of course that will end as soon as I tell them how much they have to pay."

The 4pm time of day is a very thin liquidity period as North American banks shut op shop for the day and its only really NZ banks fully up and running. If you can stay alert, and get the good info from forexlive, there are days with easy pips on offer: