In June 2017, Dōan moved toEredivisie clubFC 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.[4]
On 15 April 2018, againstRoda, Dōan scored his eighth goal of the season, equaling the total of goalsArjen Robben scored as a teenager for Groningen.[5]
On 5 July 2022,SC Freiburg announced that they had signed Dōan ahead of the2022–23 season.[8] Later that year, he scored his first goal for the club on 6 August, in a 4–0 win versusAugsburg.[9] In the2024–25 season, he became his club's top scorer with 10 goals, all scored in the Bundesliga.[10]
He was called-up byHajime Moriyasu to represent Japan in the2022 FIFA World Cup. He featured in Japan's first match of the competition againstGermany on 23 November 2022, being subbed on in the second half while Japan was 1–0 down. Dōan scored theequalizer four minutes after coming on as his side later went on to win the game 2–1.[14] In an almost identical turn of events, he was subbed on in the second half of Japan's final group stage match againstSpain on 1 December 2022 while Japan was 1–0 down, and scored the equalizer two minutes after coming on as his side later went on to win 2–1. The win ultimately qualified Japan for the tournament'sknockout stages as group winners.[15]