Bank of Japan Deputy Governor Kikuo Iwata on Tuesday played down any risk that expected interest rate increases by the U.S. Federal Reserve or the Bank of England could pose to financial markets, and dismissed suggestions that the BOJ should raise rates to prevent the yen from falling too fast. Iwata, speaking at the upper house financial affairs committee, acknowledged there was a chance currencies could react to such rate hikes but noted that foreign exchange markets may have fully priced in expected interest rate increases.