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Changes in Officers4584Kidswell Bio CorporationPharmaceuticals

Notice Regarding the Selection of Director Candidates, Organizational Changes and Personnel Changes

The reappointment of 3 directors, including the president, will be submitted to the Annual General Meeting of Shareholders, and 1 current director is scheduled to retire upon expiration of the term of office. In addition, a Research and Development Headquarters integrating the research, development and production functions has been established, and the related positions and responsibilities have been changed.

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47Recurring
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Who is moving to which position

Resolved 14 May 2026

Incoming appointee

6 items
Scheduled Appointment Date29 June 2026 (the scheduled date of the 26th Annual General Meeting of Shareholders). Subject to election at the General Meeting of Shareholders
Kurebayashi Shinya (紅林伸也)
Previous positionRepresentative Director and President; Executive Officer, Chief Executive Officer, Chief Communications Officer and Head of the Corporate Strategy Headquarters
New positionRepresentative Director and President; Executive Officer, Chief Executive Officer, Chief Communications Officer and Head of the Corporate Strategy Headquarters
Eiki Norikazu (栄木憲和)
Previous positionDirectors
New positionDirector (reappointment)
Nishioka Sachiko (西岡佐知子)
Previous positionDirectors
New positionDirector (reappointment)
Masubuchi Noriko (桝渕紀子)
Previous positionHead of the Translational Research Department, Development Headquarters
New positionExecutive Officer, Head of the Research and Development Headquarters
Sakabe Munetaka (坂部宗親)
Previous positionExecutive Officer, Head of Production Division
New positionExecutive Officer, Deputy Head of the Research and Development Headquarters; Director, 株式会社S-Quatre
Kawakami Masayuki (川上雅之)
Previous positionExecutive Officer, Head of the Development Headquarters; Director, 株式会社S-Quatre
New positionExecutive Officer, Deputy Head of the Research and Development Headquarters; Director, 株式会社S-Quatre
Year joined the company2025 (Masubuchi Noriko (桝渕紀子); not disclosed for the others)
Because the names and counts do not correspond, they are shown as reported without linking the counts to individual names.

Departing officer

1 item
Date of departure29 June 2026 (予定)
Mitani Yasuyuki (三谷泰之)Next role stated
Former PositionDirectors
New positionRetirement (expiration of term of office)

“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

Retirement upon expiration of the term of office

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

Not scheduled to remain on the Board of Directors. However, the new positions effective 14 May 2026 are stated as Representative Director and President of 株式会社S-Quatre and Director of Kidswell Bio Corporation.

Directors after the change3Number
Shareholders’ meeting approvalRequired. The proposal, “Election of 3 Directors,” will be submitted to the 26th Annual General Meeting of Shareholders scheduled for 29 June 2026.
Reason for change

Organizational and personnel changes will be implemented to strengthen coordination between management strategy and research and development strategy through the reorganization of the research and development structure, and to operate the research and development functions in an integrated manner in preparation for the Company’s upcoming clinical development phase.

Reasons for appointment

Through global project management activities in pharmaceutical development, the candidate has been involved in a broad range of development stages, from nonclinical research through clinical development and approval. The candidate is being nominated as a person who can lead the integrated operation of the research and development functions and advance the cell therapy business within the Company’s group under the organizational changes to the research and development structure accompanying the transition to this development phase.

Details of organizational changes

The functions of the Research Headquarters, Development Headquarters and Production Headquarters have been integrated, and the Research and Development Headquarters has been established.

Who is moving to which position
ItemDetails
Resolution date14 May 2026
Scheduled Appointment Date29 June 2026 (the scheduled date of the 26th Annual General Meeting of Shareholders). Subject to election at the General Meeting of Shareholders
Date of departure29 June 2026 (予定)
Name of appointeeKurebayashi Shinya (紅林伸也), Eiki Norikazu (栄木憲和), Nishioka Sachiko (西岡佐知子), Masubuchi Noriko (桝渕紀子), Sakabe Munetaka (坂部宗親), Kawakami Masayuki (川上雅之)
Appointee's new positionRepresentative Director and President; Executive Officer, Chief Executive Officer, Chief Communications Officer and Head of the Corporate Strategy Headquarters, Director (reappointment), Director (reappointment), Executive Officer, Head of the Research and Development Headquarters, Executive Officer, Deputy Head of the Research and Development Headquarters; Director, 株式会社S-Quatre, Executive Officer, Deputy Head of the Research and Development Headquarters; Director, 株式会社S-Quatre
Appointee's previous positionRepresentative Director and President; Executive Officer, Chief Executive Officer, Chief Communications Officer and Head of the Corporate Strategy Headquarters, Directors, Directors, Head of the Translational Research Department, Development Headquarters, Executive Officer, Head of Production Division, Executive Officer, Head of the Development Headquarters; Director, 株式会社S-Quatre
Year the appointee joined the Company2025 (Masubuchi Noriko (桝渕紀子); not disclosed for the others)
Name of departing officerMitani Yasuyuki (三谷泰之)
Former position of departing officerDirectors
New position of departing officerRetirement (expiration of term of office)
Reason for departureRetirement upon expiration of the term of office
Whether the incumbent will remain in officeNot scheduled to remain on the Board of Directors. However, the new positions effective 14 May 2026 are stated as Representative Director and President of 株式会社S-Quatre and Director of Kidswell Bio Corporation.
Reason for changeOrganizational and personnel changes will be implemented to strengthen coordination between management strategy and research and development strategy through the reorganization of the research and development structure, and to operate the research and development functions in an integrated manner in preparation for the Company’s upcoming clinical development phase.
Reasons for appointmentThrough global project management activities in pharmaceutical development, the candidate has been involved in a broad range of development stages, from nonclinical research through clinical development and approval. The candidate is being nominated as a person who can lead the integrated operation of the research and development functions and advance the cell therapy business within the Company’s group under the organizational changes to the research and development structure accompanying the transition to this development phase.
Number of directors after the change3 directors (including 2 outside directors)
Details of organizational changesThe functions of the Research Headquarters, Development Headquarters and Production Headquarters have been integrated, and the Research and Development Headquarters has been established.
Subject to Approval by the General Meeting of ShareholdersRequired. The proposal, “Election of 3 Directors,” will be submitted to the 26th Annual General Meeting of Shareholders scheduled for 29 June 2026.
Items this document does not state (4)
Appointee's date of birthNumber of shares held by the appointeeFiling as an independent officerChange 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.

The changes are intended to strengthen coordination between management strategy and research and development strategy through the reorganization of the research and development structure, and to operate the research and development functions in an integrated manner in preparation for the Company’s upcoming clinical development phase. They are also intended to optimize the clinical development structure for the cell therapy business and rebuild the human capital management and data-sharing and management structures.

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Notice Regarding the Selection of Director Candidates, Organizational Changes and Personnel Changes | Kidswell Bio Corporation (4584) timely disclosure | Komori