Shogo Yamaguchi (山口 翔悟, Yamaguchi Shōgo, born February 19, 1983, in Nagoya, Aichi Prefecture) is a Japanese actor active in film, television, and theatre. Born as 山口達也 (Tatsuya Yamaguchi), he began his career under his birth name before later adopting the stage name 山口翔悟. He made his acting debut in the early 2000s and gained recognition for his leading role as Kenji Narukami/Ryukendo in the tokusatsu series Madan Senki Ryukendo. In addition to his work on screen, Yamaguchi has remained active in theatre throughout his career. After being represented by several talent agencies, including Sun Music Production and Tristone Entertainment, he joined IMILIMI in 2025.