Keio University boasts an impressive number of graduates who have made outstanding contributions to society, including:
- Former prime ministers of Japan: Junichiro Koizumi (2001-2006), Ryutaro Hashimoto (1996-1998) and Tsuyoshi Inukai (1931-1932)
- Internet Hall of Fame member and “father of the internet in Japan” Jun Murai (current dean at Keio SFC)
- Rei Kawakubo, founder of fashion label Comme des Garçons and Dover Street Market.
- Akio Toyoda, CEO of Toyota
- Toshio Suzuki, former president of Studio Ghibli
- Tarisa Watanagase, former Bank of Thailand governer
- Akihiko Hoshide, engineer and JAXA astronaut, third Japanese person to walk in space