Japanese transportation ministry officials reportedly conducted an on-site investigation at the headquarters of Toyota Motor Corporation (NYSE:TM) following the discovery of irregularities in its applications to certify specific vehicle models. The broadening repercussions of the certification test issues originated from a safety test scandal involving Toyota’s Daihatsu compact car unit, reported Reuters. This situation has also affected other Japanese automakers, as the ministry has mandated comprehensive examinations of certification procedures across the industry. According to the report, Toyota, Mazda Motor Corp.(OTC:MZDAY), Honda Motor Company, Ltd. (NYSE:HMC), Suzuki Motor Co. (OTC:SZKMY), and Yamaha Motor Co., Ltd. (OTC:YMHAY) acknowledged that they ...