Rokuro Tsuruta is on the board of KYB Corp. In the past he was Superintendent Public Prosecutor at Nagoya High Public Prosecutors Office, Auditor of Mitsubishi Chemical Corp. (Old), Auditor for Mitsubishi Plastics, Inc., Auditor of Sumitomo Mitsui Banking Corp., Professor-Law School at Chiba University and Professor-Law School at Surugadai University.