Mizuho (NYSE: MFG) details broad board and executive reshuffle

Rhea-AI Filing Summary

Mizuho Financial Group is overhauling its board and senior management structure, with changes effective April 1 and late June 2026, subject to required regulatory and other approvals. Hidekatsu Take will become Chairperson of the Board, while Seiji Imai will remain a board member without the chair role.

The slate includes 14 director candidates, combining reappointments and new appointments such as outside director Keiji Kojima and internal executives Makoto Hitomi, Fusae Akamatsu, Shiro Shiraishi, and Makoto Samejima. Multiple executive officers will shift roles, including new Deputy Presidents, a new Group Chief Financial Officer, and revised responsibilities for key functions such as strategy, compliance, risk, human resources, information systems, audit, and process management.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of February 2026

Commission File Number 001-33098

Mizuho Financial Group, Inc.

(Translation of registrant’s name into English)

5-5, Otemachi 1-chome

Chiyoda-ku, Tokyo 100-8176

Japan

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F ☒ Form 40-F ☐

THIS REPORT ON FORM 6-K SHALL BE DEEMED TO BE INCORPORATED BY REFERENCE INTO THE PROSPECTUS FORMING A PART OF MIZUHO FINANCIAL GROUP, INC.’S REGISTRATION STATEMENT ON FORM F-3 (FILE NO. 333-282497) AND TO BE A PART OF SUCH PROSPECTUS FROM THE DATE ON WHICH THIS REPORT IS FURNISHED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: February 27, 2026
Mizuho Financial Group, Inc.
By:		/s/ Takefumi Yonezawa
Name:		Takefumi Yonezawa
Title:		Senior Managing Corporate Executive / Group CFO

February 27, 2026

Mizuho Financial Group, Inc.

Changes in Directors and Executive Officers

Mizuho Financial Group, Inc. hereby announces changes in Members of the Board of Directors and Executive Officers (including changes in their areas of responsibility, etc.).

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Mizuho Financial Group, Inc. (MHFG)

1. Candidates for Members of the Board of Directors and Related Information

(1) Changes in Members of the Board of Directors

(Effective as of April 1, 2026)

Name		New Position				Current Position
Hidekatsu Take		Member of the Board of Directors, Chairperson (Kaicho)				Member of the Board of Directors, Deputy President & Corporate Executive (Representative Corporate Executive)		Head of Global Corporate & Investment Banking Company / Head of Global Transaction Banking Unit / In Charge of Specially Assigned Matters
Seiji Imai		Member of the Board of Directors				Member of the Board of Directors, Chairperson (Kaicho)

(2) Members of the Board of Directors Candidates (to be considered at the ordinary General Meeting of Shareholders of MHFG in June 2026 (“The Shareholders’ Meeting”))

Takashi Tsukioka		(Reappointment, Outside Director)
Kotaro Ohno		(Reappointment, Outside Director)
Hiromichi Shinohara		(Reappointment, Outside Director)
Yumiko Noda		(Reappointment, Outside Director)
Takakazu Uchida		(Reappointment, Outside Director)
Masahiko Tezuka		(Reappointment, Outside Director)
Yuki Ikuno		(Reappointment, Outside Director)
Keiji Kojima		(New appointment, Outside Director)
Hidekatsu Take		(Reappointment)
Makoto Hitomi		(New appointment)
Masahiro Kihara*1		(Reappointment)
Fusae Akamatsu*1		(New appointment)
Shiro Shiraishi*1		(New appointment)
Makoto Samejima*1		(New appointment)
Total of 14 candidates

(Note)*1		The candidates expected to concurrently serve as Corporate Executives*2
*2		Corporate Executive : Executive Officer as defined in the Companies Act of Japan

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(3) Members of the Board of Directors scheduled to resign

(Effective in late June 2026)

Yoshimitsu Kobayashi		(Currently Member of the Board of Directors (Outside Director))
Seiji Imai		(Currently Member of the Board of Directors, Chairperson (Kaicho))
Hisaaki Hirama		(Currently Member of the Board of Directors)
Mitsuhiro Kanazawa		(Currently Members of the Board of Directors, Senior Managing Corporate Executive)
Takefumi Yonezawa		(Currently Members of the Board of Directors, Senior Managing Corporate Executive)

(Note) The composition of the Chairperson of the Board of Directors and the Committees after The Shareholders’ Meeting is planned to be included in the Convocation Notice of the Ordinary General Meeting of Shareholders.

(4) Brief Personal Record of Newly Nominated Members of the Board of Directors

Name		Keiji Kojima
Business Experience		Jun. 2025		Vice Chairman, Hitachi, Ltd. (current)
				Member of the IT / Digital Transformation Committee of MHFG (current)
				Outside Director, Member of the Board, Marubeni Corporaion (current)
		Apr. 2025		Director, Vice Chairman, Hitachi, Ltd.
		Apr. 2022		Director, Representative Executive Officer, President & CEO, Hitachi, Ltd.
		Jun. 2021		Director, Representative Executive Officer, President & COO, Hitachi, Ltd.
		Apr. 2018		Representative Executive Officer, Executive Vice President and Executive Officer, Hitachi, Ltd.
		Apr. 2016		Senior Vice President and Executive Officer, Chief Executive Officer of Services & Platforms Business Unit, Hitachi, Ltd.
		Apr. 2012		Vice President & Executive Officer, Hitachi, Ltd.
		Apr. 2011		General Manager, Hitachi Research Laboratory, R&D Group, Hitachi, Ltd.
		Apr. 1982		Joined Hitachi, Ltd.
Education		Mar. 2005		Graduated from the Doctoral Program in Information Science, Graduate School of The University of Osaka
		Mar. 1982		Graduated from Graduate School of Science, Kyoto University
Date of Birth		Oct.9,1956

3

Name		Makoto Hitomi
Business Experience		Apr. 2025		Senior Managing Corporate Executive Group Chief Human Resources Officer of MHFG (current)
		Apr. 2024		Group Executive Officer Group Co-Chief Human Resources Officer of MHFG Managing Executive Officer Chief Human Resources Officer of MHBK (current) Managing Executive Officer Chief Human Resources Officer of MHTB (current)
		Apr. 2022		Operating Officer General Manager, Talent Planning and Management Department of MHFG
		July. 2021		Operating Officer Co-General Manager, Global Talent Planning and Management Department of MHFG
		Apr. 2020		General Manager, Human Resources Dept of MHSC
		Apr. 2019		General Manager, Facility Management Department of MHFG
		Apr. 2016		General Manager, Tochigi Branch of MHBK
		Apr. 1993		Joined our group
Education		Mar. 1993		Graduated from Hitotsubashi University, Faculty of Economics
Date of Birth		Apr. 23, 1969

Name		Fusae Akamatsu
Business Experience		May. 2025		Operating Officer General Manager, Internal Audit Department of MHBK (current)
		Jun. 2024		Joined our group Operating Officer General Manager, Internal Audit Department of MHFG
		Jan. 2016		Managing Director General Manager, Core Compliance Department, Goldman Sachs Japan Co.,Ltd.
		May 2006		Vice President Core Compliance Department, Goldman Sachs (Japan) Ltd., Tokyo Branch*1 *1   Effective October 2006, following its incorporation, Goldman Sachs (Japan) Ltd., Tokyo Branch was renamed Goldman Sachs Japan Co., Ltd.
		Jun. 2005		Vice President Equities Compliance Department, Goldman Sachs (Japan) Ltd., Tokyo Branch
		Sep. 1999		Internal Audit Department, Goldman Sachs (Japan) Ltd., Tokyo Branch *2 *2   Promoted to Vice President in 2002, serving until 2005.
		Aug. 1998		Internal Audit Department, Bankers Trust Singapore
		Aug. 1997		Internal Audit Department, Bankers Trust Hong Kong
		Aug. 1992		External Audit Department, Price Waterhouse London
Education		Mar. 1992 Jun. 1997		Graduated from Keio University, Faculty of Law Graduated from Cambridge Law School (LL.M.)
Date of Birth		Sep. 7, 1968

4

Name		Shiro Shiraishi
Business Experience		Apr. 2025		Senior Managing Corporate Executive * Group Chief Risk Officer (Group CRO) of MHFG (current) * served as Senior Executive Officer from April 2024 to April 2025
		Apr. 2024		Executive Managing Director Chief Risk Officer (CRO) of MHBK (current)
		Apr. 2023		Operating Officer Chief Audit Executive (CAE) of MHBK
		Apr. 2022		Operating Officer Head of Internal Audit Group of MHBK
		Oct. 2021		Operating Officer Deputy Head of Retail & Business Banking Company of MHFG
		Jul. 2021		Operating Officer, General Manager Retail & Business Banking Coordination Department of MHFG (until Mar. 2022)
		Apr. 2019		General Manager Retail & Business Banking Coordination Department of MHFG President Mizuho Factors, Limited (until Mar. 2020)
		Apr. 1993		Joined our group
Education		Mar. 1993 May. 2001		Graduated from The University of Tokyo, Faculty of Law Graduated from Columbia Business School
Date of Birth		Dec. 14, 1970

Name		Makoto Samejima
Business Experience		Apr. 2024		Operating Officer Head of Chief Audit Executive (CAE) of MHBK (current)
		Jan. 2023		Operating Officer Deputy Head of Global Corporate Company* of MHFG * Renamed as Global Corporate & Investment Banking Company in Apr 2023
		Apr. 2022		Operating Officer Co-Head of Global Corporate Division* of MHBK (until Apr. 2024) * Renamed as Global Corporate & Investment Banking Division in Apr 2023
		Apr. 2020		General Manager* Global Corporate Coordination Department of MHFG * Promoted to Operating Officer Jul. 2021
		Apr. 2019		Joint General Manager Global Corporate Coordination Department of MHFG
		Apr. 1994		Joined our group
Education		Mar. 1994		Graduated from The University of Tokyo, Faculty of Law
Date of Birth		Jan. 11, 1971

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2. Changes in Executive Officers and Operating Officers

Executive Officers in this section collectively refer to Corporate Executives* (i.e., executive officers as defined in the Companies Act) and Executive Officers** (i.e., executive officers as defined in our internal regulations).

* Examples include Deputy President & Corporate Executive, Senior Managing Corporate Executives.

** Examples include Deputy President & Executive Officer, Senior Managing Executive Officers.

(Effective as of April 1, 2026)

Name		New Position				Current Position
Takefumi Yonezawa		Members of the Board of Directors, Senior Managing Corporate Executive		Head of Research & Consulting Unit / Group Chief Sustainability Officer (Group CSuO) / In Charge of Specially Assigned Matters		Members of the Board of Directors, Senior Managing Corporate Executive		Group Chief Financial Officer (Group CFO)
Masayuki Sugawara		Deputy President & Corporate Executive (Representative Corporate Executive)		Head of Domestic Wholesale Business / Head of Corporate & Investment Banking Company		Senior Managing Corporate Executive		Head of Corporate & Investment Banking Company
Naoshi Inomata		Deputy President & Corporate Executive		Head of Domestic Retail Business / Co-Head of Retail & Business Banking Company		Senior Managing Corporate Executive		Group Chief Strategy Officer (Group CSO)
Shuji Matsuura		Senior Managing Corporate Executive		Head of Global Corporate & Investment Banking Company		Senior Managing Executive Officer		CEO for the Americas
Makoto Samejima		Senior Managing Corporate Executive		Group Chief Financial Officer (Group CFO)		—		Operating Officer of MHBK
Minori Komatsu		Senior Managing Corporate Executive		Group Chief Human Resources Officer (Group CHRO)		Operating Officer		General Manager of Talent Planning and Management Department
Shinichiro Hihara		Senior Managing Corporate Executive		Group Chief Information Officer (Group CIO)		Senior Managing Executive Officer		Group Co-Chief Information Officer (Group Co-CIO)

6

Name		New Position				Current Position
Hideki Tsujimori		Senior Managing Corporate Executive		Group Chief Process Officer (Group CPrO)		Senior Managing Executive Officer		Group Chief Process Officer (Group CPrO)
Fusae Akamatsu		Senior Managing Corporate Executive		Group Chief Compliance Officer (Group CCO)		—		Operating Officer of MHBK
Minako Nakamoto		Senior Managing Corporate Executive		Group Chief Audit Executive (Group CAE)		Senior Managing Corporate Executive		Group Chief Compliance Officer (Group CCO)
Takeshi Koyama		Senior Managing Corporate Executive		Group Chief Strategy Officer (Group CSO)		Operating Officer		General Manager of Corporate Strategy Office
Noriyuki Sato		Senior Managing Executive Officer		Head of Asset Management Company		Senior Managing Corporate Executive		Head of Asset Management Company / In Charge of Specially Assigned Matters
Mitsuhiro Kanazawa		Member of the Board of Directors				Members of the Board of Directors, Senior Managing Corporate Executive		Group Chief Information Officer (Group CIO)
Makoto Hitomi		Reassigned		Member of the Board of Directors of MHFG (scheduled for late June 2026)		Senior Managing Corporate Executive		Group Chief Human Resources Officer (Group CHRO)
Kazutoshi Isogai		Resigned				Senior Managing Corporate Executive		Co-Head of Retail & Business Banking Company
Hisashi Kikuchi		Resigned				Senior Managing Corporate Executive		Group Chief Audit Executive (Group CAE)

7

(Effective in late June 2026)

Name		New Position				Current Position
Fusae Akamatsu		Members of the Board of Directors, Senior Managing Corporate Executive		Group Chief Compliance Officer (Group CCO)		Senior Managing Corporate Executive		(same as on the left)
Shiro Shiraishi		Members of the Board of Directors, Senior Managing Corporate Executive		Group Chief Risk Officer (Group CRO)		Senior Managing Corporate Executive		(same as on the left)
Makoto Samejima		Members of the Board of Directors, Senior Managing Corporate Executive		Group Chief Financial Officer (Group CFO)		Senior Managing Corporate Executive		(same as on the left)
Takefumi Yonezawa		Senior Managing Corporate Executive		Head of Research & Consulting Unit / Group Chief Sustainability Officer (Group CSuO) / In Charge of Specially Assigned Matters		Members of the Board of Directors, Senior Managing Corporate Executive		(same as on the left)

The management changes described above are subject to any approval or permission required being obtained from the relevant regulatory or other authorities.

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FAQ

What leadership changes did Mizuho Financial Group (MFG) announce?

Mizuho Financial Group announced broad changes to its Board and executive officers, including a new Chairperson, new Deputy Presidents, and refreshed leadership across finance, risk, compliance, human resources, information systems, and audit, effective April 1 and late June 2026, subject to required approvals.

When do Mizuho Financial Groups board and executive changes take effect?

The management changes at Mizuho Financial Group are scheduled to take effect on April 1, 2026, and in late June 2026. These include board reappointments, new director appointments, and reassigned executive officer roles, all subject to necessary regulatory and other approvals being obtained.

Who will be the new Chairperson of Mizuho Financial Groups Board?

Hidekatsu Take will become Chairperson of Mizuho Financial Groups Board of Directors. He currently serves as Deputy President & Corporate Executive and leads global corporate, investment banking, and transaction banking operations, and will transition to the chair role effective April 1, 2026, pending approvals.

How many director candidates did Mizuho Financial Group (MFG) propose?

Mizuho Financial Group proposed a total of 14 director candidates. The list combines reappointed outside directors and internal executives, along with new appointments such as outside director Keiji Kojima and internal executives Makoto Hitomi, Fusae Akamatsu, Shiro Shiraishi, and Makoto Samejima.

Which new outside director is joining Mizuho Financial Groups Board?

Keiji Kojima is slated to join Mizuho Financial Group as a new outside director. The filing outlines his extensive leadership background at Hitachi, Ltd. and other organizations, with his candidacy included among the 14 proposed directors, subject to necessary approvals.

What executive officer role changes did Mizuho Financial Group outline?

Mizuho Financial Group detailed multiple role changes, including promotions to Deputy President & Corporate Executive, appointment of Makoto Samejima as Group Chief Financial Officer, and reassignment of responsibilities in sustainability, strategy, compliance, risk, audit, human resources, process management, and information systems leadership.