Keio University (慶應義塾大学, Keiō Gijuku Daigaku),abbreviated as Keio (慶應, Keio) or Keidai (慶大, Keidai), is a Japanese university located in Minato, Tokyo. It is known as the oldest institute of higher education in Japan. Founder Fukuzawa Yukichi originally established it as a school for Western studies in 1858 in Edo (now Tokyo). It has eleven campuses in Tokyo and Kanagawa. It has nine faculties, with Letters, Economics, Laws, Business and Commerce, Medicine, Science and Technology, Policy Management, Environment and Information Studies, Nursing and Medical Care, and Pharmacy. The alumni include 3 Japanese prime ministers and prominent corporate leaders. Currently 12 Keio graduates engage as the Fortune Global 500's CEOs. Keio traces its history to 1858 when Fukuzawa Yukichi, who had studied the Western educational system at Brown University in the United States, started to teach Dutch while he was a guest of Okudaira family. In 1868 he changed the name of the school to Keio Gijuku and devoted all his time to education.