Otsuka Holdings Co, Ltd. is a holding company organised around 4 areas of activity:
- manufacture and sale of pharmaceutical products (65.2% of sales): prescription drugs and intravenous solutions mainly for the treatment of central nervous system disorders, cancer, cardiovascular, gastrointestinal and ophthalmic diseases. In addition, the group sells diagnostic products and medical devices;
- manufacture and sale of nutraceutical products (25.1%): functional foods and beverages, OTC products, nutritional supplements;
- production of mineral waters, beverages and foods (2.1%);
- other (7.5%): manufacture of functional chemicals and fine chemicals, provision of logistics services, manufacture of electronic products, etc.
Net sales by source of income are divided between sales of products (93.8%), sales of licences and royalties (1.8%) and other (4.4%).
Net sales are distributed geographically as follows: Japan (43.2%), North America (34%),
OTSUKA HOLDINGS CO., LTD. 
