After we failed to break the year's lows against the euro, people decided to take some money off the table. Hedge funds are among those selling the dollar, and they're causing this sharp move upward.
People are unwinding short yen positions ahead of the BOJ meeting. Some market participants are speculating on what kind of the language and economic assessment would come out of the meeting.
People have got high hopes for this number, to justify some of the bigger expectations for Fed rate increases we've seen develop this week. No one's going to want to put on big bets before the report though.