Manulife Financial (MFC) 40-F Annual report (Canada)

Exhibit 99.6

CERTIFICATION

Pursuant to 18 United States Code s. 1350

As adopted pursuant to

Section 906 of the Sarbanes–Oxley Act of 2002

In connection with the Annual Report on Form 40-F of Manulife Financial Corporation (the “Company”) for the year ended December 31, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officer of the Company certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

1. The Report fully complies, in all material respects, with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

Date: March 27, 2008

/s/ Dominic D’Alessandro
Name:	Dominic D’Alessandro
Title:	President and Chief Executive Officer