April 2, 2004 Information Disclosure Policy Established Mitsui Sumitomo Insurance Company Limited (the "Company") (President , Hiroyuki Uemura) has adopted the "Information Disclosure Policy" (the "Policy") governing information disclosure-related activities. The Policy is the first corporate disclosure policy established by a non-life insurer in Japan. It has been also made public on the corporate website of the Company. 1. Purpose Highly transparent and fair corporate governance has been more keenly expected in the society. Awareness of disclosing useful information to stakeholders has been increasingly required from a viewpoint of CSR (corporate social responsibility) as well. Amid these circumstances, the Company has adopted the Policy to clarify in-house standards for speedy information disclosure and improved consistency in disclosure-related activities. 2. Basic Concepts and Guidelines (1) Information should be duly disclosed if it is material enough to be subject to legal requirements and guidelines set by the General Insurance Association of Japan. (2) Moreover, to ensure commitment to highly transparent and fair corporate governance, the Company basically intends to disclose proactively certain information useful to stakeholders* which may fall even outside the coverage of the guidelines of the association, too. Following this principle, the Company may opt to disclose specific information each time when it considers the specific information is highly preferable to be disclosed for social interests and information needs, and that disclosing the specific information would help the Company's attitude understood properly in the society. To make this decision, the Disclosure Committee should be held, and its consideration on rationality and reasonability should include business surroundings and social expectations as well. * "Stakeholders" mean, in this context, shareholders, policyholders, agents, suppliers, society, communities and others who may be concerned. (3) Nonetheless, the Company should not disclose specific information if it reasonably believes it may violate its confidentiality obligation to a policyholder, supplier, and/or investee by doing that, that the specific information may be premature and of low certainty, or that disclosing it may cause interpretations vary greatly dependent on assumptions and calculations and be misleading as a result.   >>Information Disclosure Policy