Akira Miyazaki graduated from the Faculty of Economics, Soka University, in 1979. Joined Deloitte Haskins & Sells (now Deloitte Touche Tohmatsu LLC) in the same year as a certified public accountant. Engaged in auditing work for eight years until 1987. In 1987, joined Yotsuya Certified Public Accountant Office. Appointed as a director of Yotsuya Business Consulting Co., Ltd. in 1997. In 2008, established Yotsuya Audit Corporation and became a representative partner. During this time, in addition to auditing, he was involved in subsidiary and affiliate management, group management, corporate revitalization, and management innovation support. After retiring as a representative partner in 2022, he opened a personal office.

In March 2025, he joined Makoto International Audit Corporation as a partner.