6-K

MIZUHO FINANCIAL GROUP INC (MFG)

6-K 2026-02-27 For: 2026-02-27
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Added on April 05, 2026

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NO. 333-282497) AND TO BE A PART OF SUCH PROSPECTUS FROM THE DATE ON WHICH THIS REPORT IS FURNISHED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.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
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(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<br><br><br>(Representative Corporate Executive) Head of Global Corporate & Investment Banking Company /<br><br><br>Head of Global Transaction Banking Unit /<br> <br>In Charge of Specially<br>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<br>of MHFG in June 2026 (“The Shareholders’ Meeting”)) ****
--- ---
Takashi Tsukioka (Reappointment, Outside Director)
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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.
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(4) Brief Personal Record of Newly Nominated Members of the Board of Directors
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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

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Name Makoto Hitomi
Business Experience Apr. 2025 Senior Managing Corporate Executive<br> <br>Group Chief<br>Human Resources Officer of MHFG (current)
Apr. 2024 Group Executive Officer<br> <br>Group Co-Chief Human Resources Officer of MHFG<br> <br><br> <br>Managing<br>Executive Officer<br> <br>Chief Human Resources Officer of MHBK (current)<br> <br><br><br><br>Managing Executive Officer<br> <br>Chief Human Resources Officer of MHTB<br>(current)
Apr. 2022 Operating Officer<br> <br>General Manager, Talent<br>Planning and Management Department of MHFG
July. 2021 Operating Officer<br> <br>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<br> <br>General Manager, Internal<br>Audit Department of MHBK (current)
Jun. 2024 Joined our group<br> <br>Operating Officer<br><br><br>General Manager, Internal Audit Department of MHFG
Jan. 2016 Managing Director<br> <br>General Manager, Core<br>Compliance Department, Goldman Sachs Japan Co.,Ltd.
May 2006 Vice President<br> <br>Core Compliance Department,<br>Goldman Sachs (Japan) Ltd., Tokyo Branch^*1^<br> <br><br><br><br>^*1^   Effective October 2006, following its<br>incorporation, Goldman Sachs (Japan) Ltd., Tokyo Branch was renamed Goldman Sachs Japan Co., Ltd.
Jun. 2005 Vice President<br> <br>Equities Compliance<br>Department,<br> <br>Goldman Sachs (Japan) Ltd., Tokyo Branch
Sep. 1999 Internal Audit Department, Goldman Sachs (Japan) Ltd., Tokyo Branch^*2^<br><br><br><br><br><br>^*2^   Promoted to Vice President in 2002,<br>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<br> <br><br><br><br>Jun. 1997 Graduated from Keio University, Faculty of Law<br> <br><br><br><br>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 *<br> <br>Group<br>Chief Risk Officer (Group CRO) of MHFG (current)<br> <br><br><br><br>* served as Senior Executive Officer from April 2024 to April 2025
Apr. 2024 Executive Managing Director<br> <br>Chief Risk Officer<br>(CRO) of MHBK (current)
Apr. 2023 Operating Officer<br> <br>Chief Audit Executive (CAE)<br>of MHBK
Apr. 2022 Operating Officer<br> <br>Head of Internal Audit Group<br>of MHBK
Oct. 2021 Operating Officer<br> <br>Deputy Head of<br>Retail & Business Banking Company of MHFG
Jul. 2021 Operating Officer, General Manager<br><br><br>Retail & Business Banking Coordination Department of MHFG (until Mar. 2022)
Apr. 2019 General Manager<br> <br>Retail & Business<br>Banking Coordination Department of MHFG<br> <br><br> <br>President<br><br><br>Mizuho Factors, Limited (until Mar. 2020)
Apr. 1993 Joined our group
Education Mar. 1993<br> <br><br><br><br>May. 2001 Graduated from The University of Tokyo, Faculty of Law<br> <br><br><br><br>Graduated from Columbia Business School
Date of Birth Dec. 14, 1970
Name Makoto Samejima
--- --- ---
Business Experience Apr. 2024 Operating Officer<br> <br>Head of Chief Audit Executive<br>(CAE) of MHBK (current)
Jan. 2023 Operating Officer<br> <br>Deputy Head of Global<br>Corporate Company* of MHFG<br> <br><br> <br>* Renamed as<br>Global Corporate & Investment Banking Company in Apr 2023
Apr. 2022 Operating Officer<br> <br>Co-Head of Global Corporate Division* of MHBK (until Apr. 2024)<br> <br><br><br><br>* Renamed as Global Corporate & Investment Banking Division in Apr 2023
Apr. 2020 General Manager*<br> <br>Global Corporate Coordination<br>Department of MHFG<br> <br><br> <br>* Promoted to<br>Operating Officer Jul. 2021
Apr. 2019 Joint General Manager<br> <br>Global Corporate<br>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.<br>
** Examples include Deputy President & Executive Officer, Senior Managing Executive Officers.<br>
--- ---

(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 /<br><br><br>Group Chief Sustainability Officer (Group CSuO) /<br> <br>In Charge of<br>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<br><br><br>(Representative Corporate Executive) Head of Domestic Wholesale Business /<br> <br>Head of<br>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 /<br> <br>In Charge of<br>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 /<br><br><br>Group Chief Sustainability Officer (Group CSuO) /<br> <br>In Charge of<br>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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