Mikako Kotani (小谷 実可子, Kotani Mikako, born 30 August 1966) is a Japanese former synchronized swimmer who competed in the 1988 Summer Olympics, where she gained a bronze medal each for the solo and duet events, and the 1992 Summer Olympics.

[2] She was the first woman to be Japan's flag-bearer for the 1988 Summer Olympics Opening Ceremony.

[3] Since retiring, Mikako Kotani has opened a synchronized swimming school and served on the JOC (Japanese Olympic Committee), IOC Athletes' Commission, and Association of National Olympic Committees.

[3] In 1997, she introduced the resolution to promote Olympic truce to the United Nations General Assembly.

[4] In 2013, she was chosen to present the proposed venue layout for Tokyo's successful bid to host the 2020 Summer Olympics.