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

Notice Regarding Organizational Changes and Personnel Changes

The Technical Development Department will be reorganized as the Mechanical and Brush Development Department, integrating the development functions for general carbon products. In connection with this, the responsibilities and department-head positions within the Technical Headquarters will change, and a personnel appointment will be made for the head of the Domestic Sales Department to concurrently serve as head of the Tokyo Sales Office.

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Who is moving to which position

Resolved 20 April 2026

Incoming appointee

3 items
Scheduled Appointment DateEffective 1 May 2026 (Okubo Yuji (大久保裕司), Bito Shingo (尾藤信吾)); effective 1 July 2026 (Adachi Toshinobu (足立敏宣))
Okubo Yuji (大久保裕司)
Previous positionDeputy General Manager, Technical Headquarters; in charge of the Analytical Research Department, Technical Development Department and Process Technology Development Department
New positionDeputy General Manager, Technical Headquarters; in charge of the Analytical Research Department; concurrently in charge of the Mechanical and Brush Development Department and the Process Technology Development Department
Bito Shingo (尾藤信吾)
Previous positionGeneral Manager, Technical Development Department, Technical Headquarters
New positionGeneral Manager, Mechanical and Brush Development Department, Technical Headquarters
Adachi Toshinobu (足立敏宣)
Previous positionHead of the Tokyo Sales Office, Domestic Sales Department, Global Sales Headquarters
New positionGeneral Manager, Domestic Sales Department, Global Sales Headquarters; concurrently Head of the Tokyo Sales Office
Details of organizational changes

The Technical Development Department of the Technical Headquarters will be reorganized as the Mechanical and Brush Development Department.

Who is moving to which position
ItemDetails
Resolution date20 April 2026
Scheduled Appointment DateEffective 1 May 2026 (Okubo Yuji (大久保裕司), Bito Shingo (尾藤信吾)); effective 1 July 2026 (Adachi Toshinobu (足立敏宣))
Name of appointeeOkubo Yuji (大久保裕司), Bito Shingo (尾藤信吾), Adachi Toshinobu (足立敏宣)
Appointee's new positionDeputy General Manager, Technical Headquarters; in charge of the Analytical Research Department; concurrently in charge of the Mechanical and Brush Development Department and the Process Technology Development Department, General Manager, Mechanical and Brush Development Department, Technical Headquarters, General Manager, Domestic Sales Department, Global Sales Headquarters; concurrently Head of the Tokyo Sales Office
Appointee's previous positionDeputy General Manager, Technical Headquarters; in charge of the Analytical Research Department, Technical Development Department and Process Technology Development Department, General Manager, Technical Development Department, Technical Headquarters, Head of the Tokyo Sales Office, Domestic Sales Department, Global Sales Headquarters
Details of organizational changesThe Technical Development Department of the Technical Headquarters will be reorganized as the Mechanical and Brush Development Department.
Items this document does not state (15)
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 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 improve the efficiency of materials development and accelerate development by integrating the development functions for general carbon products.

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