Tsunekazu joined NEC Corporation in 1983, where he first engaged in the development of rocket guidance and control computers, and then the design & development of onboard equipment for the International Space Station, satellites, and aircraft, sensor systems such as SAR, and spatial information systems. He was seconded to the National Space Development Agency of Japan (now JAXA), and after studying at Purdue University he drove business execution in various roles, including project manager, department head, and as the person in charge of new business promotion. In 2019 he was appointed director of Quasi-Zenith Satellite System Services Inc., where he was responsible for the management of the company responsible for the operation of critical national space systems and service provision. He aims to create and expand space utilization business by leveraging his consistent and broad experience in the aerospace field, from aerospace design and development to company management.