Louis Takaji Julien Thébault-Yamaguchi (Japanese: 山口 瑠伊, born 28 May 1998) is a footballer who plays as a goalkeeper for J1 League club Kawasaki Frontale, on loan from Machida Zelvia.
Born in La Garenne-Colombes, Paris to a French father and a Japanese mother, Yamaguchi moved to Tokyo at six months old,[1] and returned to France at the age of 16, joining FC Lorient's youth setup.
[2] On 16 June 2017, after finishing his formation, he moved to Spanish Segunda División B side Extremadura UD, being initially assigned to the reserves.
[8] He appeared in one match, a 1-1 (2-4) penalty shootout loss to the fifth-division University of Tsukuba team in the Emperor's Cup, before being sent on loan to Kawasaki Frontale.
[9] Yamaguchi made his club debut for Frontale keeping a clean sheet in a 1-0 win against Ventforet Kofu in the J.League Cup quarter-finals.