After earning a degree in mechanical engineering from the Department of Mechanical Engineering, Tokyo City University (formerly Musashi Institute of Technology), Koriyama experienced many years of micro-vehicle experiments, R&D and automobile engine design for overseas customers at Yamaha Motor and was the Project Manager of the Engine Control Unit at Bosch. 

During this time, he has visited many countries, and was also stationed in Germany, giving him an international outlook and bridging between Japanese and overseas customers. In Bosch, many JOEMs were visited, and new business successfully won.

Koriyama started his career with Conflux Technology as a Sales Engineer for the Asia/Japan region in April 2022. So far, he has visited many JOEMs, raising awareness and business opportunities for Conflux Technology. His core focus is on building trusting relationships with customers.