In May 1996, Mitsubishi Bank and the Bank of Tokyo merged in Japan. In San Francisco, the Bank of California and Union Bank c ... onsolidated into UnionBanCal Corporation, a bank holding company, and its primary subsidiary Union Bank of California, N.A. With the merger, Union Bank could now trace its history back to the founding of the Bank of California 132 years before. In 1999, UnionBanCal Corporation became a publicly traded company listed on the New York Stock Exchange (NYSE:UB). Currently Traded as (NYSE: MUFG) read more