Exhibit 13.1

CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), the undersigned officer of NTT DOCOMO, INC. (the “Company”) hereby certifies, to such officer’s knowledge, that:

The Annual Report on Form 20-F for the year ended March 31, 2010 (the “Report”) of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: June 24, 2010

/s/  RYUJI YAMADA

Ryuji Yamada

President and Chief Executive Officer