Eisai Inc. has added 24,148 sf to its 85,000 sf of manufacturing facilities in Research Triangle Park, providing space for research labs, offices, manufacturing, packing, locker rooms, a cafeteria and 130 parking spaces. The development also includes raw materials storage in an off-site warehouse. Eisai is the U.S. Pharmaceutical division of Esai Co. Ltd. of Japan and manufactures Aricept and Aciphex. Esai currently employs 130 people at the RTP facility.