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Changes in Officers9552Quants Research Institute Holdings,Inc.Information and Communications, Services and Others

Notice Concerning Changes in Executive Officers and Reassignment of Directors' Responsibilities

Effective 1 October 2026, management division oversight will change from Kagami Hiroki (鏡弘樹) to Yamaguchi Daiki (山口大樹). In addition, at the general meeting of shareholders scheduled for 18 December, Yamaguchi Daiki (山口大樹) is scheduled to be elected as a director, while Kagami Hiroki (鏡弘樹) is scheduled to retire as a director.

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Who is moving to which position

Resolved 1 October 2026

Incoming appointee

1 item
Scheduled Appointment DateEffective 1 October 2026, Yamaguchi Daiki (山口大樹) is scheduled to become Head of the Administrative Division. Subject to approval at the 8th Annual General Meeting of Shareholders scheduled for 18 December 2026, Yamaguchi Daiki (山口大樹) is scheduled to become a director.
Yamaguchi Daiki (山口大樹)
Previous positionExecutive Officer, 株式会社M&A総合研究所
New positionDirector (予定), Executive Officer and Head of the Administrative Division

Departing officer

1 item
Date of departureAt the close of the 8th Annual General Meeting of Shareholders scheduled for 18 December 2026 (Kagami Hiroki (鏡弘樹) will retire as a director)
Kagami Hiroki (鏡弘樹)Next role stated
Former PositionDirectors
New positionExecutive Officer (予定)

“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.

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

Kagami Hiroki (鏡弘樹) will not remain on the Board of Directors but is scheduled to continue serving as an Executive Officer of the Company after retiring as a director.

Shareholders’ meeting approvalYes. The Company plans to submit a proposal to elect Yamaguchi Daiki (山口大樹) as a new director at the 8th Annual General Meeting of Shareholders scheduled for 18 December 2026.
Reason for change

Effective 1 October 2026, management division oversight will change from Kagami Hiroki (鏡弘樹) to Yamaguchi Daiki (山口大樹), with Yamaguchi Daiki (山口大樹) taking over the duties handled by Kagami Hiroki (鏡弘樹).

Reasons for appointment

The Company intends to accelerate growth across the Company Group by leveraging Yamaguchi Daiki’s (山口大樹) experience in business expansion at 株式会社M&A総合研究所.

Who is moving to which position
ItemDetails
Resolution date1 October 2026
Scheduled Appointment DateEffective 1 October 2026, Yamaguchi Daiki (山口大樹) is scheduled to become Head of the Administrative Division. Subject to approval at the 8th Annual General Meeting of Shareholders scheduled for 18 December 2026, Yamaguchi Daiki (山口大樹) is scheduled to become a director.
Date of departureAt the close of the 8th Annual General Meeting of Shareholders scheduled for 18 December 2026 (Kagami Hiroki (鏡弘樹) will retire as a director)
Name of appointeeYamaguchi Daiki (山口大樹)
Appointee's new positionDirector (予定), Executive Officer and Head of the Administrative Division
Appointee's previous positionExecutive Officer, 株式会社M&A総合研究所
Name of departing officerKagami Hiroki (鏡弘樹)
Former position of departing officerDirectors
New position of departing officerExecutive Officer (予定)
Whether the incumbent will remain in officeKagami Hiroki (鏡弘樹) will not remain on the Board of Directors but is scheduled to continue serving as an Executive Officer of the Company after retiring as a director.
Reason for changeEffective 1 October 2026, management division oversight will change from Kagami Hiroki (鏡弘樹) to Yamaguchi Daiki (山口大樹), with Yamaguchi Daiki (山口大樹) taking over the duties handled by Kagami Hiroki (鏡弘樹).
Reasons for appointmentThe Company intends to accelerate growth across the Company Group by leveraging Yamaguchi Daiki’s (山口大樹) experience in business expansion at 株式会社M&A総合研究所.
Subject to Approval by the General Meeting of ShareholdersYes. The Company plans to submit a proposal to elect Yamaguchi Daiki (山口大樹) as a new director at the 8th Annual General Meeting of Shareholders scheduled for 18 December 2026.
Items this document does not state (8)
Appointee's date of birthYear the appointee joined the CompanyNumber of shares held by the appointeeReason for departureNumber of directors after the changeFiling as an independent officerDetails of organizational changesChange 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 clarify the division of responsibilities among the officers as the transfer of authority to Yamaguchi Daiki (山口大樹) progresses. They are also intended to accelerate growth across the Company Group by leveraging Yamaguchi Daiki’s (山口大樹) experience in business expansion at 株式会社M&A総合研究所, while strengthening the Partnerships Department within the Sales Division by leveraging Kagami Hiroki’s (鏡弘樹) experience at financial institutions and knowledge of alliance operations.

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Notice Concerning Changes in Executive Officers and Reassignment of Directors' Responsibilities | Quants Research Institute Holdings,Inc. (9552) timely disclosure | Komori