Born in Hokkaido, Japan, Rei Yamaguchi trained at Hisatomi Ballet and later graduated from English National Ballet School. He danced with Birmingham Royal Ballet (BRB) and English National Ballet (ENB) before joining Hong Kong Ballet as a Corps de Ballet member in 2022.

With BRB, he performed in David Bintley’s Cinderella, and with ENB, he danced in Wayne Eagling’s The Nutcracker and Tamara Rojo’s Raymonda.