Nissan Motor Co. top executive Hiroto Saikawa said Monday he will step down from his post on Sept. 16 amid mounting pressure following reports of receiving improper remuneration, leaving to his successor the company's management at one of the most difficult times in its history.Nissan will name a new leader by the end of October to replace Saikawa, who assumed the post of CEO in April 2017 and served as a close lieutenant of former Chairman Carlos Ghosn, while Chief Operating Officer Yasuhiro Yamauchi will be acting CEO until then.The new CEO will face daunting challenges including rebuildi…READ FULL ARTICLE