After graduating from high school, he joined Japan Soccer League club Mazda (later Sanfrecce Hiroshima) in 1986.
In 2017, the club results were bad and manager Hajime Moriyasu was sacked in July.
[1] On 25 December 2022, Yokouchi appointment manager of J2 relegation club, Jubilo Iwata for upcoming 2023 season.
[2] On 12 November 2023, Yokouchi brought his club promotion to J1 League from 2024 after defeat Tochigi SC 1–2 at away games in final day.
This biographical article related to a Japanese association football midfielder born in the 1960s is a stub.