Yumi Adachi (足立 夢実, Adachi Yumi, born 7 February 1989) is a Japanese synchronised swimmer.

Yumi competed in the women's team event the 2012 Summer Olympics, and the 2009, 2011 and 2013 World Aquatics Championships.

[1][2] She retired after the 2013 World Aquatics Championships.

[3] Media related to Yumi Adachi at Wikimedia Commons