CLEVELAND and TOKYO, March 2, 2015 – Athersys, Inc. (Nasdaq:ATHX) and Chugai Pharmaceutical Co., Ltd. (Tokyo Stock Exchange: 4519) have announced a partnership and license agreement to exclusively develop and commercialize MultiStem®cell therapy for ischemic stroke in Japan. Ischemic stroke represents a priority disease area in Japan, given the high healthcare burden of the condition and the expected increase in incidence associated with Japan’s aging population.