After featuring for both Funabashi Municipal High School and the Teikyo University, Takagi opted to retire and pursue a coaching career from the upcoming year.
[2][3] Nevertheless, he stayed just one year in Hiratsuka, since Gainare Tottori offered him a new job at the club, this time as the coach of the U-18 side.
[4] After the dismissal of Daisuke Sudo by the club, Gainare offered Takagi the top team coaching spot, which he accepted for the 2019 season.
[5] His work was notable, since he won the "Manager of the Month" Award twice in his rookie season (in July and October 2019).
[6][7] He was dismissed from the head coach of Gainare Tottori on May 4, 2021 [8] On 27 November 2022, Takagi appointed of manager J3 club, FC Imabari from 2023 replace Kazuaki Hashikawa left the club after end of 2022 season.