Complex sentence: The auditors that advised Mitarai told him canon should close its US operations and put the money in the bank as it would make more money off the interest, however he chose to ignore their advice and take on the challenge of turning the company around.
Split into simpler sentences: The auditors that advised Mitarai told him canon should close its US operations and put the money in the bank as it would make more money off the interest. However, he chose to ignore their advice and take on the challenge of turning the company around.