After the intervention play on Thursday last week, it seems like Tokyo officials were going to be dealt a setback on Friday as USD/JPY continued to test a push back above the 160 mark. But evidently, they had other plans and resorted to going to the US to help in a joint intervention effort to bring USD/JPY down. In stepping in to help Japan, it says two things. One, is that the US agrees that the Japanese yen currency has been "mistreated". To keep things short, the US can offer up some additional support to Japan in bolstering the defense of the yen currency.