Kawachi was born in Hiroshima Prefecture on April 27, 1955.
After graduating from Osaka University of Commerce, he joined his local club, the Toyo Industries (later Mazda) in 1978.
He played 92 games and scored 11 goals in Division 1.
On June 16, 1979, Kawachi debuted for Japan national team against South Korea.
This biographical article related to a Japanese association football midfielder born in the 1950s is a stub.