Hiramatsu serves as a Professor of Accounting at the School of Business Administration and Graduate School of Business Administration. The scholar also served as the head of Admission Department since 1997-1999.
Within his country, he is serving as a director of the Financial Accounting Standards Foundation; a member of the CPA-Auditing Oversight Board and the Business Accounting Deliberation Council of the Japanese Ministry of Finance.
Hiramatsu is currently the Vice President-at-Large of the International Association for Accounting Education & Research, the President of the JAIAS and the 2005-2006 International Member-at-Large of AAA Council of American Accounting Association. He also served for International Accounting Standards Committee as a member of the Strategy Working Party during 1997-1999.