On 31 January 2021, Hashioka joinedSint-Truiden on loan for the remainder of the 2020–21 season.[6] Hashioka made his debut in European football on 28 February 2021, as a substitute in a 2–0 defeat toEupen.[7] Hashioka joined Sint-Truiden permanently at the end of the season, scoring his first goal for the club on 17 September 2023, in a 2–0 victory overMechelen.[8]
On 30 January 2024, Hashioka signed withLuton Town, becoming the first ever Japanese player in the club history.[9][10] He made his Hatters debut after coming off the bench in a 6–2 loss to holdersManchester City in the fifth round of theFA Cup.[11] He then scored an own goal in the 2nd minute against Manchester City in the Premier league on 13 April 2024.
After playing for several youth teams, Hashioka made his first team debut for theJapan national team, on 10 December 2019, in a 2–1 victory overChina.[14]
^"サッカーの準決勝は3日の20時キックオフ".www.soccerdigestweb.com (in Japanese). Soccer Digest Web.Archived from the original on 24 August 2023. Retrieved24 August 2023.
^"D. Hashioka".Soccerway.Archived from the original on 31 January 2024. Retrieved31 January 2024.