Note: This document has been translated from the Japanese original for reference purposes only. In the event of any discrepancy between this translated document and the Japanese original, the original shall prevail.
February 19, 2026
Company name: SINFONIA TECHNOLOGY CO., LTD.
Name of representative: Shinichi Hirano, President
(Securities code: 6507; TSE Prime Market)
Inquiries: Yasuhiro Tanimoto, Administrative & Personnel Department, General Affairs Secretary Group Leader
(Telephone: +81-3-5473-1800)
Notice Concerning Changes of Representative Directors and Officers
SINFONIA TECHNOLOGY CO., LTD. (the "Company") hereby announces that, at the meeting of the Board of Directors held today, February 19, 2026, it resolved the changes of Representative Directors and Officers effective April 1, 2026, as well as the candidates for Directors and Substitute Corporate Auditors to be submitted to the 102nd Ordinary General Meeting of Shareholders scheduled to be held in late June 2026, as outlined below.
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Changes of Representative Directors (Effective April 1, 2026)
Newly Appointed Representative Directors (Two persons)
New Position
Name
Current Position
Representative Director and President
Minoru Yamakuni
Director and Senior Managing Executive Officer
Representative Director and Senior Managing Executive Officer
Hiroharu Senju
Director and Senior Officer
Retiring Representative Directors (Two persons)
New Position
Name
Current Position
Chairman
Shozo Buto
Representative Director and Chairman
Director and Senior Advisor
Shinichi Hirano
Representative Director and President
Reason for the Changes
The two current Representative Directors have promoted the three-year medium-term management plan, "SINFONIA NEW STAGE 2024," which commenced in the fiscal year ended March 2023, steadily improving profitability and strengthening the Company's business foundation.
As business performance has now stabilized, the Company recognizes this timing as a critical turning point for transitioning to a new phase of growth. On this occasion, the Company has decided to rejuvenate its management structure in order to further enhance growth potential and organizational agility.
Under the leadership of the next generation of executives, the Company will continue to work as one unified group to further enhance corporate value.
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Directors (Scheduled for Late June 2026)
New Candidate for Director
New Position
Name
Current Position
Director
Hideyo Tsuchida
Officer
Director Scheduled to Retire
Director Shinichi Hirano [scheduled to assume the position of Senior Advisor of the Company]
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Substitute Corporate Auditor (Scheduled for Late June 2026) Candidate for Substitute Corporate Auditor
Name
Current Position
Koji Sasakawa
Substitute Corporate Auditor
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Officers
Newly Appointed Officers (Effective April 1, 2026)
New Position
Name
Current Position
Officer
Hiroyuki Watanabe
General Manager of the Electrical Products & Systems Works, Toyohashi Plant, Electrical
Products & Systems Division
Officer
Kiyoshi Utatsu
General Manager of the Engineering Department of the Aerospace Systems Works, Ise Plant, Electronics & Precision
Products Division
Officer
Takahito Araki
General Manager of the FA System Sales Department, Electronics &
Precision Products Division
Newly Assigned Officer Positions (Effective April 1, 2026)
New Position
Name
Current Position
Representative Director and Senior Managing Executive Officer
Hiroharu Senju
Director and Senior Officer
Senior Officer
Hideyo Tsuchida
Officer
Retiring Officers (Effective March 31, 2026)
Officer | Makoto Motoyoshi | [to serve as Advisor of the Company] |
Officer | Hiroshi Saito | [Quality-related duties of the Ise Plant of the Electronics & Precision Products Division] |
After the conclusion of the 102nd Ordinary General Meeting of Shareholders, the Company's executive
structure will be as follows:
(Nine (9) Directors and four (4) Corporate Auditors) Directors
Position | Name |
Chairman | Shozo Buto |
Representative Director and President | Minoru Yamakuni *Promotion |
Representative Director and Senior Managing Executive Officer | Hiroharu Senju *Promotion |
Director and Senior Officer | Takaichi Hatano |
Director and Senior Officer | Tsutomu Inagaki |
Director and Senior Officer | Hideyo Tsuchida *New appointment |
Outside Director (Part-time) | Tatsunobu Sako |
Outside Director (Part-time) | Jun Fujioka |
Outside Director (Part-time) | Akiko Fujioka |
Corporate Auditors
Position | Name |
Corporate Auditor (Full-time) | Satoru Hori |
Outside Corporate Auditor (Full-time) | Kenji Ohnishi |
Corporate Auditor (Part-time) | Koichi Yuikawa |
Outside Corporate Auditor (Part-time) | Kayo Tamura |
(Eleven (11) Officers)
Position | Name |
Senior Officer | Katsuyuki Sakamoto |
Officer | Eiichiro Saeki |
Officer | Kazutaka Hayashi |
Officer | Manabu Seta |
Officer | Akira Shiozaki |
Officer | Teruki Ueda |
Officer | Kazuya Usui |
Officer | Takashi Ogura |
Officer | Hiroyuki Watanabe *New appointment |
Officer | Kiyoshi Utatsu *New appointment |
Officer | Takahito Araki *New appointment |
Note: From April 1, 2026 until the date of the Ordinary General Meeting of Shareholders, Mr. Hideyo Tsuchida will serve as a Senior Officer. Accordingly, the total number of Officers during this period will be twelve (12).
(Appendix) Brief Biography of Newly Appointed Representative Directors
New Position: Representative Director and President Name: Minoru Yamakuni
Date of Birth: October 21, 1963
Education: Faculty of Mechanical Engineering, Kagoshima University Graduated in 1987
Career Summary:
April 1987 Joined SHINKO ELECTRIC CO., LTD.
(currently SINFONIA TECHNOLOGY CO., LTD.)
April 2017 General Manager of the Motion Control Products Works, Ise Plant, Electronics & Precision Products Division of the Company
April 2020 Officer, Deputy General Manager of the Electronics & Precision Products Division, and General Manager of the Ise Plant, Electronics & Precision Products Division of the Company
April 2022 Senior Officer, General Manager of the Electronics & Precision Products Division
June 2022 Director and Senior Officer, General Manager of the Electronics & Precision Products Division
April 2024 Director and Senior Managing Executive Officer, General Manager of the Electronics & Precision Products Division
June 2025 Director and Senior Managing Executive Officer, Responsible for the Headquarters Division, in charge of the Audit Department, Administrative & Personnel Department, Legal Department, company-wide compliance and company-wide risk management of the Company (present position)
Number of Shares Owned: 10,200 shares (as of September 30, 2025)
New Position: Representative Director and Senior Managing Executive Officer Name: Hiroharu Senju
Date of Birth: December 15, 1965
Education: Faculty of Economics, Kyushu Sangyo University Graduated in 1990
Career Summary:
April 1990 Joined SHINKO ELECTRIC CO., LTD.
(currently SINFONIA TECHNOLOGY CO., LTD.)
October 2014 General Manager of Electrical Products Sales Department, Electrical Products & Systems Division of the Company
June 2019 Officer, In charge of Social Infrastructure System, Electrical Products, and Testing System Businesses, Electrical Products & Systems Division of the Company, and General Manager of Electrical Products Sales Department, Electrical Products & Systems Division of the Company
June 2021 Director and Officer, In charge of Electrical Products, Vibratory Material Handling Systems, and Testing System Businesses, Electrical Products & Systems Division of the Company
April 2022 Director and Senior Officer, In charge of Electrical Products and Vibratory Material Handling Systems, Electrical Products & Systems Division and responsible for the Sales Operations Administration Department, sales companies, branches, and sales offices of the Company
January 2025 Director and Senior Officer, General Manager of the Electrical Products & Systems Division, and in charge of the Social Infrastructure System business of the Electrical Products & Systems Division and responsible for sales companies, branches, and sales offices of the Company (present position)
Number of Shares Owned: 7,300 shares (as of September 30, 2025)