In July 2007 he, along with Yukio Kagayama, won the Suzuka 8 Hours endurance race on a Yoshimura Suzuki bike.

These have included The Japanese Grand Prix at Motegi, where he finished 13th on his debut with the Rizla Suzuki team as a wildcard rider, as well as two races in 2007 at Jerez and Japan.

In the 2010 season, Akiyoshi stood in for the injured Hiroshi Aoyama at the Interwetten Honda team.

He competed in two races for the team, finishing 15th at the Dutch TT in Assen and 13th at the Catalan Grand Prix in Catalunya.

[1] Akiyoshi also competed at the Japanese Grand Prix as a wildcard entry with LCR Honda – along with Shinichi Itoh, racing for HRC Honda – as a gesture of support for those affected by the March 2011 Tōhoku earthquake and tsunami.