is a global pharmaceutical company and the second largest pharmaceutical company in Japan. It achieved JPY 970 billion in revenue in 2010 and is currently ranked number 17 in world sales. Its headquarter is based in Tokyo. The company also owns the American biotechnology company Plexxikon, the German biotechnology company U3 and Ranbaxy Laboratories in India. Daiichi Sankyo is the producer of Benicar (Olmesartan), an angiotensin II receptor antagonist and top selling drug in the U.S.