The statement itself didn’t say much: “Today, in accordance with Article 17 of the Bank of Japan Act, the Chairman of the Policy Board decided to call an unscheduled Monetary Policy Meeting as follows.”
Clearly, the currency markets think this emergency meeting by the Bank of Japan will lead to a policy change to try to weaken the yen. The strong currency hurts the export-based economy. The markets are expecting an easing of monetary policy. Stay tuned.