[6-K] MIZUHO FINANCIAL GROUP INC Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Mizuho Financial Group announced board and executive leadership changes effective November 30, 2025. Hidekatsu Take will serve as Member of the Board, Deputy President & Corporate Executive (Representative Corporate Executive), and will lead the Global Corporate & Investment Banking Company as well as the Global Transaction Banking Unit, while remaining in charge of specially assigned matters.

Tsutomu Yamamoto resigned. He previously served as Senior Managing Executive Officer and Head of the Global Transaction Banking Unit, in charge of specially assigned matters.

Insights

Governance analyst

Leadership realignment with defined effective date; neutral impact.

Mizuho Financial Group disclosed governance changes effective November 30, 2025. Hidekatsu Take assumes combined responsibilities across the Global Corporate & Investment Banking Company and the Global Transaction Banking Unit while retaining his board and deputy president roles.

The disclosure clarifies reporting lines and responsibilities following Tsutomu Yamamoto’s resignation. The filing lists titles and scope; cash-flow effects or strategic shifts are not indicated in the excerpt.

Subsequent disclosures may detail any operational updates resulting from the leadership change; actual impact will depend on execution under the new structure.

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 October 2025

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NO. 333-282497) AND TO BE A PART OF SUCH PROSPECTUS FROM THE DATE ON WHICH THIS REPORT IS FURNISHED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.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:		October 23, 2025
Mizuho Financial Group, Inc.
By:		/s/ Takefumi Yonezawa
Name:		Takefumi Yonezawa
Title:		Senior Managing Corporate Executive / Group CFO

October 23, 2025

Mizuho Financial Group, Inc.

Changes in Director and Executive Officers

Mizuho Financial Group, Inc. hereby announces changes in a Member of the Board of Directors and in Executive Officers of the following entity within the Group:

[Mizuho Financial Group, Inc. (MHFG)]

 (Effective as of November 30, 2025)

Name		New Position				Current Position
Hidekatsu Take		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		Member of the Board of Directors, Deputy President & Corporate Executive (Representative Corporate Executive)		Head of Global Corporate & Investment Banking Company / In Charge of Specially Assigned Matters
Tsutomu Yamamoto		Resigned				Senior Managing Executive Officer		Head of Global Transaction Banking Unit / In Charge of Specially Assigned Matters

FAQ

What changes did Mizuho Financial Group (MFG) announce?

Mizuho announced leadership changes effective November 30, 2025, including new responsibilities for Hidekatsu Take and the resignation of Tsutomu Yamamoto.

What is Hidekatsu Take’s new role at Mizuho Financial Group?

He will be Member of the Board, Deputy President & Corporate Executive (Representative Corporate Executive), and head both the Global Corporate & Investment Banking Company and the Global Transaction Banking Unit.

Who resigned from Mizuho Financial Group and from which roles?

Tsutomu Yamamoto resigned. He had been Senior Managing Executive Officer and Head of the Global Transaction Banking Unit, in charge of specially assigned matters.

When do the Mizuho leadership changes take effect?

The changes are effective on November 30, 2025.

Does the filing mention financial impacts or transaction details?

No. The excerpt focuses on governance and role changes only.

Is this 6-K linked to a registration statement?

Yes. It is incorporated by reference into Mizuho’s Form F-3 (File No. 333-282497) prospectus.