Osamu Adachi (足立 理, Adachi Osamu; born December 22, 1987) is a Japanese actor and a former member of the acting group D-BOYS. He is best known for his role as Eiji Kikumaru in The Prince of Tennis musical series, Tenimyu, and in the live film adaptation.
Source: “Osamu Adachi”, English Wikipedia (CC BY-SA 4.0), excerpt