He previously played for the Tokyo Yakult Swallows, the Hokkaido Nippon-Ham Fighters, and the Fukuoka SoftBank Hawks.

[1] On 1 April 2014, Akiyoshi debuted in the Central League against the Hiroshima Toyo Carp as a starting pitcher.

In all, he pitched in 283 games with a 19–17 Win–loss record, a 2.68 ERA, a 67 Holds, a 34 Saves, and a and a 274 strikeouts in 298.2 innings.

[3] 11 December 2018, Akiyoshi and Ryota Yachi were transferred to the Hokkaido Nippon-Ham Fighters in a 2-2 trade with Hirotoshi Takanashi and Kengo Ohta.

[5] Akiyoshi played the 2019-2021 seasons with the Hokkaido Nippon-Ham Fighters, he contributed to the team as a Closer.