He made his professional debut for the club during the 2022 season, scoring three goals in 28 league matches.[3]
On 14 August 2023, Fagiano Okayama announced that they reached an agreement with Dutch side NEC Nijmegen for the transfer of Sano on a permanent deal;[3][6] the deal was made official three days later, as the player signed a five-year contract with the Eredivisie club.[7][8] In the process, Sano became NEC's second Japanese-born signing of the season, following Koki Ogawa.[8]
He made his debut for the club on 16 September 2023, coming on as a substitute for Rober in the 59th minute of a 4–0 league loss to PSV.[9]