Hiroyuki Suzuki
Representative Director,
Chairman and CEO
| August 1980 | Joined the company |
| June 1983 | Director of the Company |
| June 1990 | Managing Director and Head of Sales Department, Western Region Sales |
| June 1997 | Managing Director, Eastern Region |
| June 1999 | Representative Director and Executive Vice President of the Company |
| April 2003 | President and CEO of the Company |
| June 2003 | Representative Director, President and Chief Managing Officer of the Company |
| June 2013 | Representative Director, Chairman and Managing Officer of the Company (current position) |
| May 2016 | Representative Director of the Kansai Economic Association |
| May 2018 | Retired as Representative Director of the Kansai Economic Association |
| June 2022 | Outside Director of Iwatani Corporation (current position) |
President and CEO of Maruichi Kohan Ltd.
President and CEO of Kyushu Maruichi Steel Tube Ltd.
Chairman of Maruichi Sun Steel Joint Stock Company (SUNSCO)
Chairman of the Board of Directors of Maruichi Stainless Tube Co., Ltd. Outside Director of Nippon Venture Capital Co., Ltd. Outside Director of Iwatani Corporation
Yoshinori Yoshimura
Representative Director,
President and COO
| March 1981 | Joined the company |
| June 1997 | Director of the Company |
| June 2003 | Retired Director and Managing Officer of the Company, General Manager of the Specialty Products Division |
| June 2005 | Director and Senior Managing Officer of the Company, General Manager of the Specialty Products Division |
| April 2006 | Executive Managing Officer, Assistant to the President, Production/Technology Division, Western Region Factory Manager, Specialty Products Division |
| June 2008 | Executive Managing Director, Assistant to the President, General Manager of Special Products Division, Production/Technology Department |
| April 2009 | Executive Managing Director, Assistant to the President, Production/Technology Division Pole Division Manager |
| June 2010 | Executive Managing Director, Assistant to the President, Production/Technology Division Pole Division Manager LSB Business Manager |
| June 2011 | Representative Director, Executive Vice President, Assistant to the President, Production/Technology Division Pole Division Manager LSB Business Manager |
| June 2013 | Representative Director, President and Managing Officer of the Company (current position) |
President and CEO of Shikoku Maruichi Steel Tube Ltd.
Wataru Morita
Director
Vice President Managing Officer in charge of Sales, Purchasing, Corporate Planning, IR and Secretary Dept.
| April 1991 | Joined Nissho Iwai Corporation (currently Sojitz Corporation) |
| June 2003 | Transferred to Metal One Corporation |
| June 2006 | Left Metal One Corporation |
| July 2006 | Joined Oregon Steel |
| November 2006 | EVRAZ Group SA acquires Oregon Steel |
| April 2011 | Left EVRAZ North America |
| June 2011 | Joined the company President of Maruichi American Corporation (MAC) |
| March 2015 | President of Maruichi Oregon Steel Tube LLC |
| June 2018 | Managing Officer of the Company |
| June 2021 | Managing Officer, Head of Corporate Planning Office, Planning and Secretarial Department |
| June 2022 | Director and Senior Managing Officer of the Company, in charge of Planning and Secretarial Departments, General Manager of Corporate Planning Office |
| July 2022 | Director and Senior Managing Officer of the Company, in charge of planning and secretarial departments |
| May 2023 | Chairman , Maruichi American Corporation (MAC) Chairman, Maruichi Oregon Steel Tube LLC |
| June 2023 | Appointed Executive Vice President and Director of the Company in charge of sales, purchasing, planning, IR and secretarial departments (current position) |
Chairman of Maruichi Metal Products (Foshan) Co., Ltd.
Maria Montserrat Anderson
Director
| April 1994 | Joined Maruichi American Corporation Assistant, Finance & Accounting Department, Maruichi American Corporation |
| April 1999 | Assistant, Finance & Accounting Department; In charge of purchasing, General Affairs Department; In charge of human resources, Human Resources & General Affairs Department, Maruichi American Corporation |
| December 2005 | Manager, Human Resources & General Affairs Department, Maruichi American Corporation |
| July 2012 | General Manager of the Human Resources and General Affairs Department of the company |
| June 2025 | Director of the Company (current position) |
| July 2025 | Chairman of Maruichi American Corporation (MAC)(current position) |
| July 2025 | Chairman of Maruichi Oregon Steel Tube LLC (current position) |
Chairman , Maruichi American Corporation (MAC) Chairman, Maruichi Oregon Steel Tube LLC
Kenjiro Nakano
Outside Director
| April 1971 | Joined Sumitomo Bank Ltd. (currently Sumitomo Mitsui Banking Corporation) |
| June 1998 | Director and Head of Securities Department of the bank |
| April 2001 | Managing Officer and General Manager of Investment Banking Division, Sumitomo Mitsui Banking Corporation |
| June 2002 | Senior Managing Officer and General Manager of the Osaka Head Office |
| June 2005 | Senior Managing Director and Senior Managing Officer, Head of Corporate Affairs Division of the Bank |
| April 2006 | Representative Director and Deputy Managing Officer of the Bank |
| June 2008 | Representative Director and Vice Chairman of the same company, based in Osaka |
| June 2008 | Audit & Supervisory Board Member of the Company |
| June 2010 | Retired as Vice Chairman of Sumitomo Mitsui Banking Corporation |
| June 2010 | President and CEO of Keihanshin Real Estate Co., Ltd. (currently Keihanshin Building Co., Ltd.) |
| June 2013 | Director of the Company (current position) |
| June 2016 | Chairman of the Board, Keihanshin Building Co., Ltd. |
| June 2022 | Special advisor to the company (current position) |
Special Advisor to Keihanshin Building Co., Ltd. Outside Director (Audit and Supervisory Committee Member) of H2O Retailing Co., Ltd.
Kenichiro Ushino
Outside Director
| April 1972 | Joined Marubeni Corporation |
| April 1993 | President of Marubeni Tubulars Inc. (Houston) |
| April 1997 | General Manager, tubes Department, Marubeni Corporation |
| October 2001 | General Manager, tubes Division, Marubeni-Itochu Steel Inc. |
| April 2003 | Managing Officer and General Manager of tubes Division of the company |
| April 2006 | Director and Senior Managing Officer, Head of Corporate Planning, Human Resources and General Affairs Division of the company |
| April 2007 | Representative Director and Vice President of the company |
| April 2009 | President and CEO of the company |
| April 2013 | Retired as CEO of the company |
| June 2016 | Director of the Company (current position) |
Yuka Fujioka
Outside Director
| April 1993 | Joined Kansai Telecasting Corporation, Programming Department, Announcement Department |
| April 1999 | News anchor for CS broadcasting Asahi News Star, etc. Lecturer for Simul Academy's conference interpreter training course |
| September 2008 | Part-time lecturer at the International Education and Cooperation Center, Kwansei Gakuin University (current position) |
| April 2009 | Part-time Lecturer, Global Studies Course, Department of English, Kobe College |
| April 2010 | Part-time lecturer at the School of International Studies, Kwansei Gakuin University (current position) |
| July 2016 | President and CEO of Fujioka Metals Co., Ltd. (current position) |
| June 2018 | Director of the Company (current position) |
| June 2024 | Outside Director of Sysmex Corporation (current position) |
President and CEO of Fujioka Metals Co., Ltd. Part-time lecturer at the International Education and Cooperation Center, Kwansei Gakuin University Part-time lecturer at the Faculty of International Studies, Kwansei Gakuin University Outside Director of Sysmex Corporation (current position)
Koichi Tsuji
Outside Director
| October 1984 | Joined Peat Marwick Mitchell CPA firm |
| September 1988 | Registered as a Certified Public Accountant (Registration Number 9656) |
| February 1989 | Based in Zurich, Switzerland |
| July 2004 | Senior Partner at Ernst & Young ShinNihon |
| February 2016 | Chairman of Ernst & Young ShinNihon LLC (currently Ernst & Young ShinNihon LLC) |
| July 2019 | EY Japan LLC Chairman & CEO Director of EY Japan Ltd. |
| June 2021 | Outside Director of Mitsubishi UFJ Financial Group, Inc. (current position) |
| June 2023 | Director of the Company (current position) Outside Auditor for Teijin Limited (current position) |
External Director of Mitsubishi UFJ Financial Group, Inc. External Auditor of Teijin Limited
Keiko Yamahira
Outside Director
| April 1983 | Joined Kubota House Co., Ltd. (now Sanyo Homes Co., Ltd.) |
| April 2010 | Managing Officer of Sanyo Homes Corporation |
| June 2011 | Director and Senior Managing Officer of the company |
| June 2012 | Director of Sanyo Reform Co., Ltd. (currently Sanyo Reform Co., Ltd.) |
| June 2013 | Executive Managing Director of Sanyo Homes Co., Ltd. Director of Sun Advance Co., Ltd. Director of Sanyo Homes Community Co., Ltd. |
| June 2015 | President and Managing Officer of Sanyo Homes Corporation |
| April 2017 | Chairman and CEO of Sanyo Homes Community Co., Ltd. |
| June 2019 | Outside Director of Joshin Denki Co., Ltd. (current position) External Director of Fujitec Co., Ltd. |
| June 2021 | Outside Director of Takara Leben Co., Ltd. (currently Mirarth Holdings Co., Ltd.) (current position) |
| June 2022 | Outside Director of Shinagawa Refractories Co., Ltd. (current position) |
Outside Director of Joshin Denki Co., Ltd.
Outside Director of MIRARTH Holdings Co., Ltd. Outside Director of Shinagawa Refractories Co., Ltd.
Takehiko Terao
Auditor （Full-time）
| April 1986 | Joined Sanwa Bank Ltd. (currently Mitsubishi UFJ Bank Ltd.) |
| February 2014 | General Manager of the Osaka Sales Department and Osaka Chuo Branch of The Bank of Tokyo-Mitsubishi UFJ, Ltd. (currently The Bank of Mitsubishi UFJ, Ltd.) |
| May 2016 | Joined the company |
| June 2018 | Secretary General of the Company |
| June 2019 | Full-time Audit & Supervisory Board Member of the Company (current position) |
Masuo Okumura
Outside Auditor
| July 1971 | Joined the National Police Agency |
| May 2001 | Chief of the Osaka Prefectural Police |
| August 2002 | Chief of the Security Bureau of the National Police Agency |
| January 2004 | Superintendent General of Police |
| March 2006 | Chairman of the All Japan Traffic Safety Association (now the All Japan Traffic Safety Association) |
| June 2013 | Chairman of the Japan Road Traffic Information Center, a public interest incorporated foundation |
| June 2013 | Audit & Supervisory Board Member of the Company (current position) |
| May 2024 | Outside Director of Baroque Japan Limited (current position) |
Outside Director of Baroque Japan Limited
Ryuta Uozumi
Outside Auditor
| April 1971 | Joined Iwasaki Electric Co., Ltd. |
| April 1975 | Joined Yamamoto Oil Co., Ltd. (currently JFE Shoji Oil Sales Co., Ltd.) |
| October 1985 | Joined Asahi Shinwa Accounting Company (now Azsa LLC) |
| March 1989 | Certified Public Accountant Registration |
| June 1999 | Partner at Asahi Audit Corporation (currently Azsa LLC) |
| June 2003 | Representative of the company |
| April 2004 | Concurrently serves as President and CEO of Azsa Sustainability Co., Ltd. (currently KPMG Azsa Sustainability Co., Ltd.) |
| June 2010 | Retired from Azsa & Co. (now Azsa & Co. LLC) |
| July 2010 | Representative of Ryuta Uozumi Certified Public Accountant Office (current position) |
| June 2013 | Retired from KPMG Azusa Sustainability Co., Ltd. |
| July 2013 | Representative of Uozumi Sustainability Institute (current position) |
| June 2018 | Audit & Supervisory Board Member of the Company (present) |
Representative of Ryuta Uozumi Certified Public Accountant Office Representative of Uozumi Sustainability Institute
Yuki Uchiyama
Outside Auditor
| April 1983 | Joined Burroughs Corporation |
| April 1989 | Moroccan Government Tourist Office |
| April 1997 | Joined Omizu Law Office (now TMI Associates) |
| April 2002 | Co-located Partner |
| June 2018 | TMI Associates Osaka Office Counsel (current position) |
| June 2019 | Audit & Supervisory Board Member of the Company (current position) |
| June 2022 | Outside Director of Nippon Seisen Co., Ltd. (current position) |
TMI Associates Osaka Office Council Nippon Seisen Co., Ltd. Outside Director
