About Us

Directors & Officers

Directors

Representative Director
Chairman & CEO
Hiroshi Shimizu
Representative Director
President & COO
Kazuaki Tokiwa
Director
Senior Managing Executive Officer
Junji Irie Senior General Manager of Administrative Division
& Senior General Manager of Corporate Planning Division
Director
Managing Executive Officer
Gakuyuki Kajiyama Senior General Manager of Sales &Marketing Division
Director
Full-time Audit & Supervisory Committee Member
Masato Koizumi
Director
Audit & Supervisory Committee Member
Takayuki Hayakawa *1
Director
Audit & Supervisory Committee Member
Shigeharu Nakamura *1
Director
Audit & Supervisory Committee Member
Kazuma Shibata *1

Executive Officers

Senior Executive Officer Hirofumi Otani Senior General Manager of Innovative Film Business Division
Senior Executive Officer Michihisa Tasaka Senior General Manager of Quality Assurance Division
Executive Officer Hitoshi Sugino Senior General Manager of Technical Division
& General Manager R&D Center
Executive Officer Takeshi Sugie Senior General Manager of Procurement Division
& General Manager Logistics Department
Executive Officer Masashi Tosaka General Manager of Building & Construction Business Unit
Executive Officer Hirohito Koshimizu Senior General Manager of Manufacturing Division
& General Manager Compound Production Department
Executive Officer Toshimi Yamanaka President, RIKEN AMERICAS CORPORATION
& RIKEN ELASTOMERS CORPORATION

*1 Indicates an outside director as provided for in Article 2-15 of the Companies Act.
Designated for Independent Director as specified by the Tokyo Stock Exchange in Japan.