Akiyoshi was the captain of his school's soccer team at Luther Senior High School. He started his career with Albirex Niigata FC (Singapore) in 2008 after graduating from Luthur Senior High School and played for 2 seasons. He turned down the chance to train with the parent club Albirex Niigata in order to join Singapore Armed Forces FC in 2010.[2] He played for the club in the 2010 AFC Champions League group stage.[3]
On 18 February 2012, after a successful trial period, Akiyoshi signed a 2+1⁄2-year contract at Slavia Sofia, becoming the first ever Japanese to play in the Bulgarian A Professional Football Group.[5] He made his league debut in a 2–1 win over Minyor Pernik on 11 March, coming on as a substitute for Yordan Yurukov. On 7 April, Akiyoshi scored his first competitive goal for Slavia, scoring the equaliser in a 2–1 away win over Kaliakra Kavarna.