Attached files

file filename
10-K - 10-K - MUFG Americas Holdings Corpa2202523z10-k.htm
EX-23.1 - EX-23.1 - MUFG Americas Holdings Corpa2202523zex-23_1.htm
EX-12.1 - EX-12.1 - MUFG Americas Holdings Corpa2202523zex-12_1.htm
EX-31.1 - EX-31.1 - MUFG Americas Holdings Corpa2202523zex-31_1.htm
EX-24.1 - EX-24.1 - MUFG Americas Holdings Corpa2202523zex-24_1.htm
EX-32.2 - EX-32.2 - MUFG Americas Holdings Corpa2202523zex-32_2.htm
EX-31.2 - EX-31.2 - MUFG Americas Holdings Corpa2202523zex-31_2.htm
EX-24.2 - EX-24.2 - MUFG Americas Holdings Corpa2202523zex-24_2.htm

Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report of UnionBanCal Corporation (the "Company") on Form 10-K for the year ending December 31, 2010 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Masashi Oka, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

    (1)
    The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

    (2)
    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: March 16, 2011

  By:   /s/ MASASHI OKA

Masashi Oka
Chief Executive Officer