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Changes in Officers5310TOYO TANSO CO.,LTD.Construction and Materials

Notice Regarding Organizational Changes and Personnel Changes

Effective 1 July 2026, the Audit Department will be renamed the Internal Audit Office, and a DX Promotion Department will be established within the Corporate Planning Division. The positions and responsibilities of 5 people, including 1 executive officer, will change.

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Scale
5
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Wording
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Who is moving to which position

Resolved 19 June 2026

Incoming appointee

5 items
Scheduled Appointment Date1 July 2026
Murata Yusuke (村田 雄輔)
Previous positionExecutive Officer; Deputy General Manager, Administration Division; responsible for Quality Assurance Department; concurrently responsible for Procurement Department and Plant Construction Department
New positionExecutive Officer; Deputy General Manager, Corporate Planning Division; General Manager, DX Promotion Department; responsible for Group Companies Management Department; concurrently responsible for Global Operations Promotion Department
Masuda Shigeki (増田 茂樹)
Previous positionDeputy General Manager, Corporate Planning Division; General Manager, Global Operations Promotion Department; concurrently General Manager responsible for Planning Department and responsible for Group Companies Management Department
New positionHead of the Internal Audit Office
Yazu Keiko (矢頭 佳子)
Previous positionGeneral Manager, Group Companies Management Department, Corporate Planning Division
New positionGeneral Manager, Group Companies Management Department, Corporate Planning Division; concurrently General Manager, Global Operations Promotion Department
Shirakawa Kazuo (白川 和雄)
Previous positionGeneral Manager, Procurement Department, Administration Division
New positionDeputy General Manager, Administration Division; General Manager, Procurement Department; responsible for Quality Assurance Department; concurrently responsible for Plant Construction Department
Kusatsugu Hiromasa (草次 宏昌)
Previous positionManager, Equipment Planning and Management Section, Plant Construction Department, Administration Division
New positionGeneral Manager, Plant Construction Department, Administration Division
Reason for change

To clarify the internal audit function and to promote the DX strategy in an integrated manner

Details of organizational changes

The Audit Department will be renamed the Internal Audit Office. A DX Promotion Department will be established within the Corporate Planning Division.

Who is moving to which position
ItemDetails
Resolution date19 June 2026
Scheduled Appointment Date1 July 2026
Name of appointeeMurata Yusuke (村田 雄輔), Masuda Shigeki (増田 茂樹), Yazu Keiko (矢頭 佳子), Shirakawa Kazuo (白川 和雄), Kusatsugu Hiromasa (草次 宏昌)
Appointee's new positionExecutive Officer; Deputy General Manager, Corporate Planning Division; General Manager, DX Promotion Department; responsible for Group Companies Management Department; concurrently responsible for Global Operations Promotion Department, Head of the Internal Audit Office, General Manager, Group Companies Management Department, Corporate Planning Division; concurrently General Manager, Global Operations Promotion Department, Deputy General Manager, Administration Division; General Manager, Procurement Department; responsible for Quality Assurance Department; concurrently responsible for Plant Construction Department, General Manager, Plant Construction Department, Administration Division
Appointee's previous positionExecutive Officer; Deputy General Manager, Administration Division; responsible for Quality Assurance Department; concurrently responsible for Procurement Department and Plant Construction Department, Deputy General Manager, Corporate Planning Division; General Manager, Global Operations Promotion Department; concurrently General Manager responsible for Planning Department and responsible for Group Companies Management Department, General Manager, Group Companies Management Department, Corporate Planning Division, General Manager, Procurement Department, Administration Division, Manager, Equipment Planning and Management Section, Plant Construction Department, Administration Division
Reason for changeTo clarify the internal audit function and to promote the DX strategy in an integrated manner
Details of organizational changesThe Audit Department will be renamed the Internal Audit Office. A DX Promotion Department will be established within the Corporate Planning Division.
Items this document does not state (14)
Date of departureAppointee's date of birthYear the appointee joined the CompanyNumber of shares held by the appointeeName of departing officerFormer position of departing officerNew position of departing officerReason for departureWhether the incumbent will remain in officeReasons 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 clarify the internal audit function and to promote the DX strategy in an integrated manner. No individual reasons are stated for the other personnel changes.

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Notice Regarding Organizational Changes and Personnel Changes | TOYO TANSO CO.,LTD. (5310) timely disclosure | Komori