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Changes in Officers4951S.T.CORPORATIONMaterials and Chemicals

Notice Concerning Organizational Changes and Personnel Changes

Effective 1 November 2026, the HR function will be separated from the Corporate Management Department, which will establish the Human Capital Strategy Department, while the Corporate Management Department will be renamed the General Affairs and Legal Department. Accordingly, the departments and titles of 3 department-head-level executives will change.

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Who is moving to which position

Incoming appointee

3 items
Scheduled Appointment Date1 November 2026
Sato Akitoshi (佐藤 昭吏)
Previous positionDeputy Head, Corporate Value Creation Division, and Head, Corporate Management Department
New positionDeputy Head, Corporate Value Creation Division
Ishimatsu Tomoko (石松 智子)
Previous positionDepartment Head attached to the Corporate Value Creation Division; Project Leader, “Everyone’s Activities”
New positionHead, Human Capital Strategy Department, Corporate Value Creation Division
Daigo Keiko (醍醐 恵子)
Previous positionTeam Leader, Legal Team, Corporate Management Department, Corporate Value Creation Division
New positionHead, General Affairs and Legal Department, Corporate Value Creation Division

Departing officer

3 items
Sato Akitoshi (佐藤 昭吏)Next role stated
Former PositionDeputy Head, Corporate Value Creation Division, and Head, Corporate Management Department
New positionDeputy Head, Corporate Value Creation Division
Ishimatsu Tomoko (石松 智子)Next role stated
Former PositionDepartment Head attached to the Corporate Value Creation Division; Project Leader, “Everyone’s Activities”
New positionHead, Human Capital Strategy Department, Corporate Value Creation Division
Daigo Keiko (醍醐 恵子)Next role stated
Former PositionTeam Leader, Legal Team, Corporate Management Department, Corporate Value Creation Division
New positionHead, General Affairs and Legal Department, Corporate Value Creation Division

“Next role stated” means the document names the position the person holds after stepping down. It does not necessarily mean they are leaving the company.

Details of organizational changes

The HR function will be separated from the Corporate Management Department, and the Human Capital Strategy Department will be established. The Corporate Management Department will be renamed the General Affairs and Legal Department.

Who is moving to which position
ItemDetails
Scheduled Appointment Date1 November 2026
Name of appointeeSato Akitoshi (佐藤 昭吏), Ishimatsu Tomoko (石松 智子), Daigo Keiko (醍醐 恵子)
Appointee's new positionDeputy Head, Corporate Value Creation Division, Head, Human Capital Strategy Department, Corporate Value Creation Division, Head, General Affairs and Legal Department, Corporate Value Creation Division
Appointee's previous positionDeputy Head, Corporate Value Creation Division, and Head, Corporate Management Department, Department Head attached to the Corporate Value Creation Division; Project Leader, “Everyone’s Activities”, Team Leader, Legal Team, Corporate Management Department, Corporate Value Creation Division
Name of departing officerSato Akitoshi (佐藤 昭吏), Ishimatsu Tomoko (石松 智子), Daigo Keiko (醍醐 恵子)
Former position of departing officerDeputy Head, Corporate Value Creation Division, and Head, Corporate Management Department, Department Head attached to the Corporate Value Creation Division; Project Leader, “Everyone’s Activities”, Team Leader, Legal Team, Corporate Management Department, Corporate Value Creation Division
New position of departing officerDeputy Head, Corporate Value Creation Division, Head, Human Capital Strategy Department, Corporate Value Creation Division, Head, General Affairs and Legal Department, Corporate Value Creation Division
Details of organizational changesThe HR function will be separated from the Corporate Management Department, and the Human Capital Strategy Department will be established. The Corporate Management Department will be renamed the General Affairs and Legal Department.
Items this document does not state (13)
Resolution dateDate of departureAppointee's date of birthYear the appointee joined the CompanyNumber of shares held by the appointeeReason for departureWhether the incumbent will remain in officeReason for changeReasons for appointmentNumber of directors after the changeFiling as an independent officerChange in Corporate Governance StructureSubject to Approval by the General Meeting of Shareholders

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

To advance HR and organizational culture reforms, promote human capital management, and achieve the goals of the medium-term management plan, the “SMILE Plan.” It is also intended to strengthen overall management capabilities in support of the growth strategy and stronger corporate governance.

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Notice Concerning Organizational Changes and Personnel Changes | S.T.CORPORATION (4951) timely disclosure | Komori