By Makiko Yamazaki TOKYO (Reuters) -Toshiba Corp shareholders ousted the chairman of the board on Friday, delivering a powerful rebuke to the company after management was found to have colluded with the Japanese government to put pressure on foreign investors. The unexpected removal of chairman Osamu Nagayama, a veteran of corporate Japan, and another director marked a clear victory for corporate governance, and sent a strong signal about overseas investors' ability to push through change even at one of Japan Inc's most storied conglomerates. The board said it would undertake a full review of ...