EXHIBIT 99.1

Pursuant to Section 906 of the Public Company Accounting Reform and Investor
Protection Act of 2002 (18 U.S.C 1350, as adopted), Benjamin Hong, Chief
Executive Officer of Nara Bancorp, Inc. (the "Company") and Bon T. Goo, Chief
Financial Officer of the Company hereby certifies that, to the best of their
knowledge:

    1.   The Company's Quarterly Report on Form 10-Q for the period ended March
         31, 2003, and to which this Certification is attached as Exhibit 99.1
         (the "Periodic Report"), fully complies with the requirements of
         section 13(a) or section 15(d) of the Securities Exchange Act of 1934,
         and

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

    IN WITNESS WHEREOF, the undersigned have set their hands hereto as of the
    13th day of May, 2003.

                                            /s/ Benjamin Hong
                                            --------------------------
                                            Chief Executive Officer

                                            /s/ Bon T. Goo
                                            ---------------------------
                                            Chief Financial Officer

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