Hirokazu gained experience in planning operations related to aircraft parts maintenance and procurement at Japan Airlines Co., Ltd. He later joined AMIL Co., Ltd., where he contributed to the International Space Station (ISS) program, handling international coordination for launches, recoveries, and on-orbit experiments. After working at Axelspace Corp., he joined Space BD in January 2020. Initially involved in multiple satellite integration projects for the deployment of small satellites from the ISS (J-SSOD), he later took charge of launching small satellites as rideshare payloads aboard SpaceX's Falcon 9 and Japan's H3 Launch Vehicle.