After graduating from high school, he joined Mitsubishi Motors in 1978.
In August 1979, Yamaguchi was selected Japan U-20 national team for 1979 World Youth Championship.
In February 1981, although he did not play at his club, he was selected Japan national team because Japan's manager Saburo Kawabuchi actively appointed young players.
On February 19, Yamaguchi debuted for Japan national team against Singapore.
This biographical article related to a Japanese association football goalkeeper is a stub.