On May 28, 2021, Ohzeki re-signed a 8 million yen contract with the Fukuoka SoftBank Hawks as a registered player under control.

[3] On June 4, he made his debut as a relief pitcher in the Interleague play against the Hanshin Tigers.

On March 31, 2022, Ohzeki pitched as a starting pitcher against the Chiba Lotte Marines and recorded his first win.

[6] Ohzeki was pitched as a starting pitcher from the opening, but on August 2, it was announced that he had undergone surgery to remove a tumor on his testicle, and he was recuperating.

[9] And he finished the regular season with a 17 Games pitched, a 5-7 Win–loss record, a 2.92 ERA, and a 76 strikeouts in 104.2 innings.