Dean A. Yoost, who served 32 years with PricewaterhouseCoopers, retiring as an active partner in 2005, has re-joined the board of directors of UnionBanCal Corporation and its primary subsidiary, Union Bank of California, N. A. Initially appointed two years ago, Yoost left the board for a temporary assignment as a senior advisor with PWC in Japan in 2006 and returned this June.

?We are very happy that Dean has returned to California and to his board position with us,? said President and Chief Executive Officer Masaaki Tanaka. ?He brings proven international expertise and knowledge in a wide range of industries, which makes him an asset to the company as we continue to focus on profitability and shareholder value.?

Earlier in his career, Yoost spent 14 years in Beijing and Tokyo, where he was involved in international trade and investment. He also served in a variety of industries, including consumer products, technology, financial services, distribution, and manufacturing.

Yoost headed PWC's Orange County-based office before retiring in August 2005. In 2001, he was elected to its 19-member Global Oversight Board, the global firm's equivalent of a board of directors. He is a member of the board of directors of Emulex Corporation, an NYSE listed company.

Yoost frequently lectures on trade with China at the University of California at Irvine and at Chapman University. Additionally, he is the chairman of UCI's Joslin Diabetes Leadership Council and services as a trustee of UCI's Foundation. He was also treasurer, chief financial office and an executive board member of the Southern California Committee for the Olympic Games.

Based in San Francisco, UnionBanCal Corporation (NYSE:UB) is a bank holding company with assets of $53.2 billion at June 30, 2007. Its primary subsidiary, Union Bank of California, N.A., had 327 banking offices in California, Oregon and Washington, and 2 international offices at June 30, 2007. The company's Web site is located at www.unionbank.com.

Union Bank of California
Sharon Woodson-Bryant, 213-236-4145
Sharonw.Bryant@uboc.com
Katie Pandes, 415-765-2617
Kathryn.Pandes@uboc.com