Sompo Japan Insurance Inc. President Giichi Shirakawa will step down to take responsibility for the handling of a high-profile insurance fraud case involving used car dealership and repair chain Bigmotor Co., the insurer's parent company said Friday.The major Japanese insurer's close relationship with Bigmotor has come under scrutiny since the dealership chain was found to have charged excessive repair fees after intentionally damaging cars and to have made fraudulent insurance claims.Sompo Japan, which had loaned out many employees to Bigmotor, has been accused of overlooking the dealershi…READ FULL ARTICLE