[3] In June 2017, Dōan moved to Eredivisie club FC Groningen on loan with an option to purchase on a three-year contract.

[citation needed] The option was exercised on 23 April 2018, and Dōan transferred to Groningen on a permanent basis on 1 July 2018.

[citation needed] On 5 July 2022, SC Freiburg announced that they had signed Dōan ahead of the 2022–23 season.

[8] On 30 August 2018, Dōan received his first international call-up from the Japan national team for the Kirin Challenge Cup 2018.

[citation needed] He was called-up by Hajime Moriyasu to represent Japan in the 2022 FIFA World Cup.