The modern Union Bank was formed in 1996 when The Bank of California and Union Bank combined to create Union Bank of California as part of the merger of The Mitsubishi Bank, Ltd., and The Bank of Tokyo, Ltd., which created the world’s largest bank, The Bank of Tokyo-Mitsubishi, Ltd. In 2008, Union Bank of California shortened its name to Union Bank, signaling both its strategic plan to expand its national brand recognition, and a new era in its banking history.

No comment. Just googled them and found this. have a good night.