Just like right after Fukushima the USDJPY waited for the illiquid 5pm session to collapse, here comes part two. Have the FX HFT algos now completely taken over? A 100 pip move is catastrophic for most levered FX desks. It is time someone figured out what is casuing these periodic plunges. Sure enough, someone will gobble this up and hopefully make some money, unless there is actual news that just sent the Yen to near all time record highs.
And another perspective: