[English Translation] May 23, 2005 Notice regarding “Special Dividends and Introduction of Interim Dividends” The Company hereby announces that at the meeting of the Board of Directors held on May 23, 2005, a resolution to be proposed at the 88th Ordinary General Meeting of Shareholders, which is scheduled for June 28, 2005, was passed.The details of the resolution are that the Company will pay a special dividend and amend the relevant Article of its Articles of Incorporation to enable it to pay an interim dividend to the shareholders upon resolution of the Board of Directors in accordance with provisions of Article 293-5 of the Commercial Code. Particulars 1. Payment of Special Dividend:   The Company will pay year-end cash dividends for the 88th fiscal year of ¥9.50 per share, comprising of a regular dividend of ¥8.50 per share and a special dividend of ¥1.00 per share.Three years and six months have passed since the incorporation of Mitsui Sumitomo Insurance Company, Limited on October 1, 2001 with successful business results, except for adverse effects caused by certain natural disasters.Therefore, the Company would like to express our appreciation to the shareholders who supported this success of the Company and pay a special dividend. 2. Introduction of Interim Dividend:   The Company intends to introduce an interim dividend system in order to further increase the method of distributing profits to the shareholders.The record date of the interim dividends shall be September 30 of each year.