Immuno-Biological Laboratories Co., Ltd. is engaged in the research, development, manufacture and sale of pharmaceutical products and quasi-drugs. It operates through two business segments. Research-related segment provides research institutes, universities and pharmaceutical companies with antibody-associated test reagents, such as antibodies and enzyme immunoassay (EIA) kits, as well as other test reagents, such as cell culture related test reagents and synthetic peptides. It also offers custom-made antibody production and protein production services. Medical-related segment is engaged in the medicine seed license business and the sale of extracorporeal diagnostic agents. The Others segment retails drinking water that is made from liquefied cretine.