Komori
Changes in Officers4548SEIKAGAKU CORPORATIONPharmaceuticals

Notice Regarding Organizational Changes and Changes in Directors and Executive Officers

Effective 19 June 2026, internal Executive Officers Tomokiyo Ryoji (友清 量自) and Santo Riji (山東 理二) are slated to become director candidates, while Outside Director Sugiura Yasuyuki (杉浦 康之) is scheduled to leave office upon expiration of his term. The company will also change its Executive Officers, reorganize its operations effective 1 April, and make changes to department head positions.

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Who is moving to which position

Resolved 27 March 2026

Incoming appointee

3 items
Scheduled Appointment Date19 June 2026 (scheduled to take office following approval at the 80th Annual General Meeting of Shareholders, scheduled for 19 June 2026)
Tomokiyo Ryoji (友清 量自)
Previous positionExecutive Officer; Head of the Business Promotion Division; and General Manager of the Overseas Business Promotion Department
New positionDirector; Senior Executive Officer, overseeing Corporate Planning; Head of the Business Promotion Division; and General Manager of the Overseas Business Promotion Department
Santo Riji (山東 理二)
Previous positionNew appointment
New positionOutside directors
Shindo Satoru (進藤 覚)
Previous positionGeneral Manager of the Kurihama Plant
New positionExecutive Officer; Head of the Production Division; and General Manager of the Kurihama Plant
Year joined the company2017 (Tomokiyo Ryoji (友清 量自)); not disclosed (Santo Riji (山東 理二) and Shindo Satoru (進藤 覚))
Because the names and counts do not correspond, they are shown as reported without linking the counts to individual names.

Departing officer

3 items
Date of departure19 June 2026 (at the conclusion of the 80th Annual General Meeting of Shareholders)
Sugiura Yasuyuki (杉浦 康之)Next role stated
Former PositionOutside directors
New positionRetirement
Shimojima Yuji (下島 裕司)Next role stated
Former PositionSenior Executive Officer, overseeing overseas group companies and the Medical Science Department
New positionAdviser
Ito Masayuki (伊藤 政幸)Next role stated
Former PositionExecutive Officer, Head of Production Division
New positionAdviser

“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.

Reason for departure

Expiration of term (Sugiura Yasuyuki (杉浦 康之)). No reason for leaving office was stated for Shimojima Yuji (下島 裕司) or Ito Masayuki (伊藤 政幸).

Whether the incumbent will remain in office (whether they will retain their position)

Sugiura Yasuyuki (杉浦 康之) will leave office as a director. Shimojima Yuji (下島 裕司) and Ito Masayuki (伊藤 政幸) will leave their positions as Executive Officers and are scheduled to become advisers.

Filing as an independent officerSanto Riji (山東 理二) is scheduled to be registered as an independent officer.
Shareholders’ meeting approvalRequired. The appointments are scheduled to take effect following approval of the director election proposal at the 80th Annual General Meeting of Shareholders, scheduled for 19 June 2026.
Details of organizational changes

The HR Strategy Department will change to the HR Management Department, the General Affairs and Human Resources Department will change to the General Affairs Department, and an Operations Management Department will be established by integrating the functions of the existing Production Planning Department.

Independent officers are outside officers registered with the exchange as having no conflict of interest with general shareholders.
Who is moving to which position
ItemDetails
Resolution date27 March 2026
Scheduled Appointment Date19 June 2026 (scheduled to take office following approval at the 80th Annual General Meeting of Shareholders, scheduled for 19 June 2026)
Date of departure19 June 2026 (at the conclusion of the 80th Annual General Meeting of Shareholders)
Name of appointeeTomokiyo Ryoji (友清 量自), Santo Riji (山東 理二), Shindo Satoru (進藤 覚)
Appointee's new positionDirector; Senior Executive Officer, overseeing Corporate Planning; Head of the Business Promotion Division; and General Manager of the Overseas Business Promotion Department, Outside directors, Executive Officer; Head of the Production Division; and General Manager of the Kurihama Plant
Appointee's previous positionExecutive Officer; Head of the Business Promotion Division; and General Manager of the Overseas Business Promotion Department, New appointment, General Manager of the Kurihama Plant
Year the appointee joined the Company2017 (Tomokiyo Ryoji (友清 量自)); not disclosed (Santo Riji (山東 理二) and Shindo Satoru (進藤 覚))
Name of departing officerSugiura Yasuyuki (杉浦 康之), Shimojima Yuji (下島 裕司), Ito Masayuki (伊藤 政幸)
Former position of departing officerOutside directors, Senior Executive Officer, overseeing overseas group companies and the Medical Science Department, Executive Officer, Head of Production Division
New position of departing officerRetirement, Adviser, Adviser
Reason for departureExpiration of term (Sugiura Yasuyuki (杉浦 康之)). No reason for leaving office was stated for Shimojima Yuji (下島 裕司) or Ito Masayuki (伊藤 政幸).
Whether the incumbent will remain in officeSugiura Yasuyuki (杉浦 康之) will leave office as a director. Shimojima Yuji (下島 裕司) and Ito Masayuki (伊藤 政幸) will leave their positions as Executive Officers and are scheduled to become advisers.
Filing as an independent officerSanto Riji (山東 理二) is scheduled to be registered as an independent officer.
Details of organizational changesThe HR Strategy Department will change to the HR Management Department, the General Affairs and Human Resources Department will change to the General Affairs Department, and an Operations Management Department will be established by integrating the functions of the existing Production Planning Department.
Subject to Approval by the General Meeting of ShareholdersRequired. The appointments are scheduled to take effect following approval of the director election proposal at the 80th Annual General Meeting of Shareholders, scheduled for 19 June 2026.
Items this document does not state (6)
Appointee's date of birthNumber of shares held by the appointeeReason for changeReasons for appointmentNumber of directors after the changeChange in Corporate Governance Structure

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.

No specific reasons were provided for the individual personnel changes. The organizational changes are intended to establish a structure that integrates the promotion of its human resources strategy with human resources operations, further strengthen and develop the production structure, enhance the management functions of the Production Division, and improve operational efficiency.

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Notice Regarding Organizational Changes and Changes in Directors and Executive Officers | SEIKAGAKU CORPORATION (4548) timely disclosure | Komori