[English Translation] February 28, 2006 NOTICE REGARDING CHANGES IN CHIEF EXECUTIVE OFFICERS Mitsui Sumitomo Insurance Company, Limited (the “Company”) (President: Hiroyuki Uemura) announces that at the meeting of the Board of Directors held on February 28, 2006, it adopted a resolution to change Chief Executive Officers, which will take effect on April 1, 2006: (As of April 1, 2006) Takeo Inokuchi Chairman and Representative Director, Executive Officer (Currently Chairman and Representative Director, Chief Executive Officer) Hiroyuki Uemura President and Representative Director, Executive Officer (Currently President and Representative Director, Chief Executive Officer) Yoshiaki Shin Representative Director, Chief Executive Officer (Currently Representative Director and Vice President Executive Officer) Toshiaki Egashira Chief Executive Officer (Currently Managing Executive Officer, General Manager, Kanagawa & Shizuoka Division) >> Attachment: Career summary of new chief executive officers (as of February 28, 2006)