Yudai Tatsumi (辰巳 雄大, Tatsumi Yūdai, born 25 November 1986, in Tokyo) is a Japanese actor who is a member of the Johnny's Jr. unit Four-Yū.
In 1998, Tatsumi entered Johnny & Associates when he was in elementary school 6th grade.
[4] In 1999, Tatsumi performed his stage debut as the young Koichi in the Koichi Domoto-starring stage Show Geki '99 Mask.
[5] He acted as a member of the Johnny's Jr. internal unit M.A.D.
As a member of Four-Yū from April 2011, Tatsumi mainly works on the stage.