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 April 2010

Commission File Number 001-33098

Mizuho Financial Group, Inc.

(Translation of registrant’s name into English)

5-1, Marunouchi 2-chome

Chiyoda-ku, Tokyo 100-8333

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 x    Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨    No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):82-                    .

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: April 28, 2010
Mizuho Financial Group, Inc.
By:	/s/ Takeo Nakano
Name:	Takeo Nakano
Title:	Managing Executive Officer / CFO

April 28, 2010

To whom it may concern:

Corporate Name:	Mizuho Investors Securities Co., Ltd.
Representative:	Katsuyoshi Ejima, President
Code Number:	8607 (TSE, OSE, NSE: 1st sections)
Contact:	Financial Affairs +81-3-3663-5555
Parent Company:	Mizuho Financial Group, Inc.
Representative:	Takashi Tsukamoto, President & CEO
Code Number:	8411 (TSE, OSE: 1st sections)

Differences in Earnings Results for the Fiscal Year Ended March 31, 2010 (Fiscal 2009)

Compared to the Previous Fiscal Year

Mizuho Investors Securities Co., Ltd. (the “Company”) hereby announces differences in its earnings results for Fiscal 2009 (April 1, 2009 to March 31, 2010) compared to Fiscal 2008 (April 1, 2008 to March 31, 2009).

1. Differences in Earnings Results

(1) Non-consolidated	(Millions of yen)
	Operating Revenues		Operating Profits/  Losses	Ordinary Profits/ Losses	Net Income/ Losses
Fiscal 2009 [A]	51,651		7,289	7,527	6,703
Fiscal 2008 [B]	37,679		-13,086	-12,609	-24,999
Difference [C] = [A] – [B]	13,972		20,376	20,137	31,703
Difference (%) [C] / [B]	37.1	%	—	—	—

(Note: Amounts less than one million yen are rounded down.)

(2) Consolidated	(Millions of yen)
	Operating Revenues		Operating Profits/  Losses	Ordinary Profits/ Losses	Net Income/ Losses
Fiscal 2009 [A]	51,672		7,238	7,477	6,654
Fiscal 2008 [B]	37,703		-13,068	-12,591	-25,004
Difference [C] = [A] – [B]	13,969		20,307	20,068	31,659
Difference (%) [C] / [B]	37.1	%	—	—	—

(Note: Amounts less than one million yen are rounded down.)

2. Reasons for the Differences

The differences in earnings results for fiscal 2009 and fiscal 2008 are mainly due to an increase in operating revenues reflecting an increase in commission income and trading income as well as increases in our operating profits, ordinary profits and net income reflecting a decrease in selling, general and administrative expenses due to a decrease in administrative expenses and transaction related expenses.