A cargo ship is seen at a pier of a port in Yokohama
A cargo ship is seen at a pier of a port in Yokohama, south of Tokyo, April 7, 2010. The Bank of Japan kept monetary policy unchanged on Wednesday, saying that while the economy was improving thanks to export-led demand it was "extremely important" for Japan to break free of deflation. REUTERS/Issei Kato (JAPAN - Tags: BUSINESS EMPLOYMENT)