In this Nov. 20, 2014 file photo, Senate Commerce Committee member Sen. Bill Nelson, D-Fla. displays the parts and function of a defective airbag made by Takata of Japan that has been linked to multiple deaths and injuries in cars driven in the US, during the committee's hearing on Capitol Hill in Washington TOKYO - The top Japanese auto safety official acknowledged Friday that Japan's recall system needs an overhaul to better respond to global problems highlighted by the debacle over Takata air bags that can explode.