Hiroaki Hamada joined Kokusai Securities Co., Ltd. (now Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.) in 1988, transferred to Kokusai Finance Co., Ltd. in 1990, and appointed as a head of Business Planning Department. in 2002. He joined Ootoya Co., Ltd. (now Ootoya Holdings Co., Ltd.) as a head of Corporate Planning Department in 2004, appointed a Director in 2007, a Managing Director in 2011, and a Senior Managing Director in 2012. He was also assigned a Director in charge of Asia region, an Executive Officer in 2016, a Director in 2017. He joined Frontier Management Inc. in 2021. He was appointed as an auditor of Celebrain Corporation and an auditor of Frontier Capital Inc. in 2022.