A man walks past the Bank of Japan headquarters building in Tokyo October 26, 2011. Bank of Japan Governor Masaaki Shirakawa said on Wednesday the central bank already buys huge amounts of government bonds compared with other central banks of advanced economies. Shirakawa offered few clues on whether the BOJ will consider easing policy at Thursday's rate review, only saying that the central bank's nine-member board will carefully examine the outlook for the economy and scrutinise the best way to achieve sustainable economic growth with price stability. REUTERS/Yuriko Nakao (JAPAN - Tags: BUSINESS)