Kubota Pharmaceutical (KBBTF) 10-Q 2015 Q2 Quarterly report

Exhibit 32.1

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

I, Ryo Kubota, M.D., Ph.D., certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge, the quarterly report of Acucela Inc. on Form 10-Q for the quarter ended June 30, 2015 (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as applicable, and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Acucela Inc. for the periods presented therein.

Date:	August 6, 2015	/s/ Ryo Kubota, M.D., Ph.D.
		Chairman, President and Chief Executive Officer
		(Principal Executive Officer)