EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of East West Bancorp, Inc. on Form S-8 of our report dated February 2, 1999, appearing in the Annual Report on Form 10-K of East West Bancorp, Inc. for the year ended December 31, 1998. /s/ DELOITTE & TOUCHE LLP Los Angeles, California September 30, 1999 9