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April 18, 2006
Millea Holdings, Inc.
2-1 Marunouchi 1-chome, Chiyoda-ku, Tokyo
TSE code number: 8766

Notice of increase in net unrealized gains on securities of
a subsidiary for the fiscal year ended March 31, 2006

Millea Holdings, Inc. ("Millea Holdings") hereby announces the estimated increase in net unrealized gains on securities of its subsidiary, Tokio Marine & Nichido Fire Insurance Co., Ltd. ("Tokio Marine & Nichido"), for the fiscal year ended March 31, 2006 from the previous fiscal year, as shown below.

(Tokio Marine & Nichido) 
(A) Net unrealized gains on securities as of the end of the fiscal year ended March 31, 2006 2,158.6 billion yen
(B) Net unrealized gains on securities as of the end of the fiscal year ended March 31, 2005 1,286.7 billion yen
(C) Increase in net unrealized gains on securities for the fiscal year ended March 31, 2006 from the previous fiscal year (A-B) 871.8 billion yen
(D) Shareholders' equity of Millea Holdings as of the end of the fiscal year ended March 31, 2005 2,305.2 billion yen
C/Dx100 37.8%

Notes: 
1. The increase in net unrealized gains on securities for the fiscal year ended March 31, 2006 from the previous fiscal year (C in the above table) exceeded 30 percent of shareholders' equity of Millea Holdings as of the end of the fiscal year ended March 31, 2005 (D in the above table). Millea Holdings is required to disclose this information in accordance with timely disclosure regulations.
2. The data shown as of and for the fiscal year ended March 31, 2006 are flash figures.

<Reference>
"Other securities with market value" of Tokio Marine & Nichido

 (Yen in billions) 
  As of March 31, 2005As of March 31, 2006
Acquisition costCarrying amountDifferenceAcquisition costCarrying amountDifference
Bonds 2,785.7 2,806.2 20.5 2,786.4 2,763.8 -22.5
Stocks 999.5 2,952.5 1,952.9 973.1 4,288.8 3,315.6
Foreign Securities 438.3 461.8 23.4 444.6 503.8 59.1
Others 207.1 219.7 12.5 271.5 298.5 26.9
Total 4,430.8 6,440.3 2,009.5 4,475.9 7,855.0 3,379.0