After graduating from Tokyo University of Agriculture, he played for Fujitsu from 1984 to 1991.
At the end of the 2007 season, he resigned and became an assistant coach for the Japan national team under manager Takeshi Okada until the 2010 World Cup.
[1] On 12 December 2019, it was announced that Oki was to be appointed as the manager of J3 League club, Roasso Kumamoto from 2020.
In the 2022 season, the team achieved a record 4th place, which is their highest ever.
This biographical article related to a Japanese association football midfielder born in the 1960s is a stub.