Three executives from troubled imaging giant Olympus have pleaded guilty to boosting the company's true value in 2007 and 2008 by concealing losses in financial statements. Former chairman Tsuyoshi Kikukawa, ex-auditor Hideo Yamada and former VP Hisashi Mori were charged with fraud in the scandal, which was brought to light last year by ex-CEO Bob Woodford. He was fired by the Olympus board for blowing the whistle, but reportedly received a
