After graduating from high school, he joined his local club Mitsubishi Motors in 1973.
In 1973, the club won the champions Japan Soccer League and Emperor's Cup.
In 1978, the club won all three major title in Japan; Japan Soccer League, JSL Cup and Emperor's Cup.
On May 23, 1978, Sekiguchi debuted for Japan national team against Thailand.
This biographical article related to a Japanese association football forward is a stub.