MITSUI <MITSY>, SECURITY PACIFIC <SPC> SET PACT Mitsui and Co Ltd said it has signed a letter of intent with Security Pacific Corp to buy 50 pct of Japan Security Pacific Finance Co Ltd, for an undisclosed sum, to form a joint venture. Japan Security Pacific has assets of 200 mln dlrs. The joint venture will introduce various financial products to the customer base of Mitsui and its group of companies, the company said. Security Pacific will provide expertise in consumer and commercial lending, as well as data processing support. Japan Security Pacific Finance is a wholly-owned subsidiary of Security Pacific International Finance Inc, which is owned by Security Pacific Corp. Security Pacific said in addition to originating consumer and commercial loans and leases, the joint venture will market related financial products and services.