Eisai Co., Ltd. is a Japan-based company mainly engaged in the manufacturing and sale of pharmaceutical products. The Company operates in two business segments. The Pharmaceutical segment is engaged in the research, development, manufacturing and sale of drugs for pharmaceutical, over-the-counter and diagnostic uses. The Others segment manufactures and sells food additives, chemicals and medicine manufacturing equipment. Eisai has 50 subsidiaries and one associated company in the country, as well as in North America, Europe and Asia.