February 12, 2010
To whom it may concern:

Company Name: Mizuho Financial Group, Inc.
Representative: Takashi Tsukamoto, President & CEO
Head Office:
5-1 Marunouchi 2-chome, Chiyoda-ku,
Tokyo, Japan
Stock Code Number (Japan): 8411
(Tokyo Stock Exchange (First Section),
Osaka Securities Exchange (First Section))
Announcement regarding Capital Adequacy Ratio as of December 31, 2009

Mizuho Financial Group, Inc. hereby announces Capital Adequacy Ratio as of December 31, 2009,
based on “Consolidated Financial Statements for the Third Quarter of Fiscal 2009” disclosed on
January 29, 2010, as shown in the appendix.

Appendix
Capital Adequacy Ratio
Mizuho Financial Group (BIS Standard)
(%, Billions of yen)
(1) Consolidated Capital Adequacy Ratio
12.92
0.01
12.91
Tier 1 Capital Ratio
8.79
0.08
8.71
(2)
Tier 1 Capital
5,194.3
45.6
5,148.7
(3)
Tier 2 Capital
2,683.3
(50.1)
2,733.4
(4)
Deductions for Total Risk-based Capital
242.4
(7.0)
249.5
(5)
Total Risk-based Capital (2)+(3)-(4)
7,635.2
2.5
7,632.6
(6)
Risk-weighted Assets
59,090.7
(11.6)
59,102.3
(7)
Total Required Capital (6)X8%
4,727.2
(0.9)
4,728.1
(Reference)Prime Capital Ratio
※
5.44

0.07

5.37

※Prime Capital (Tier1 Capital(2) - preferred securities - preferred stock (excluding mandatory convertible preferred stock)) divided by Risk-weighted Assets(6)
Consolidated
Non-consolidated
Mizuho Bank (Domestic Standard)
(1) Capital Adequacy Ratio
12.82
0.03
12.79
13.00

Tier 1 Capital Ratio
7.60
0.10
7.50
7.73

(2)
Tier 1 Capital
1,859.5
22.3
1,837.1
1,819.7
(3)
Tier 2 Capital
1,337.3
(18.5)
1,355.9
1,336.3
(4)
Deductions for Total Risk-based Capital
59.9
(2.1)
62.1
97.0
(5)
Total Risk-based Capital (2)+(3)-(4)
3,136.9
5.9
3,130.9
3,059.0
(6)
Risk-weighted Assets
24,466.6
(5.5)
24,472.1
23,524.9
(7)
Total Required Capital (6)X8%
1,957.3
(0.4)
1,957.7
1,881.9
Mizuho Corporate Bank (BIS Standard)
(1) Capital Adequacy Ratio
14.63
0.10
14.53
16.10
Tier 1 Capital Ratio
11.59
0.15
11.44
10.84
(2)
Tier 1 Capital
3,817.7
33.1
3,784.5
3,194.2
(3)
Tier 2 Capital
1,178.8
(26.5)
1,205.3
1,621.6
(4)
Deductions for Total Risk-based Capital
179.1
(5.1)
184.3
72.0
(5)
Total Risk-based Capital (2)+(3)-(4)
4,817.4
11.8
4,805.6
4,743.8
(6)
Risk-weighted Assets
32,914.2
(157.7)
33,072.0
29,453.4
(7)
Total Required Capital (6)X8%
2,633.1
(12.6)
2,645.7
2,356.2
Mizuho Trust & Banking (BIS Standard)
(1) Capital Adequacy Ratio
14.10
0.26
13.84
14.34
Tier 1 Capital Ratio
9.08
0.32
8.76
9.22
(2)
Tier 1 Capital
273.2
4.5
268.6
272.4
(3)
Tier 2 Capital
159.0
(4.6)
163.6
158.4
(4)
Deductions for Total Risk-based Capital
7.8
(0.2)
8.0
7.3
(5)
Total Risk-based Capital (2)+(3)-(4)
424.4
0.2
424.2
423.6
(6)
Risk-weighted Assets
3,008.7
(56.3)
3,065.0
2,952.3
(7)
Total Required Capital (6)X8%
240.6
(4.5)
245.2
236.1
(Reference)Mizuho Bank (BIS Standard)
(1) Capital Adequacy Ratio
12.71
(0.05)
12.76
12.87
Tier 1 Capital Ratio
7.51
0.05
7.46
7.63
(2)
Tier 1 Capital
1,846.9
9.7
1,837.1
1,801.3
(3)
Tier 2 Capital
1,337.3
(29.5)
1,366.9
1,336.3
(4)
Deductions for Total Risk-based Capital
60.0
(2.1)
62.2
97.2
(5)
Total Risk-based Capital (2)+(3)-(4)
3,124.2
(17.6)
3,141.8
3,040.5
(6)
Risk-weighted Assets
24,577.3
(26.7)
24,604.0
23,606.6
(7)
Total Required Capital (6)X8%
1,966.1
(2.1)
1,968.3
1,888.5
As of
December 31,
2009
Change from
September 30,
2009
As of
December 31,
2009
As of
September 30,
2009
Change from
September 30,
2009
As of
December 31,
2009
As of
September 30,
2009