Miyoshi was born in Kawasaki on March 26, 1997. He joined J1 League club Kawasaki Frontale from their youth team in 2015. He played many matches from 2016 season. In 2017, Frontale won the J1 champions first time in the club history. In 2018, he moved to Hokkaido Consadole Sapporo. In 2019, he moved to Yokohama F. Marinos. In August 2019, he moved to Belgian First Division A club Royal Antwerp.