In 2004, Shimai completed his Master’s degree at The University of Osaka Graduate School of Medicine, Division of Health Sciences, majoring in Medical Informatics.  His professional career has included a variety of roles across business companies, academia, healthcare institutions, and administrative agencies.  Throughout this career trajectory, he has been deeply involved in advancing healthcare information systems, promoting hospital and regional healthcare digitalization (DX), and bridging academic, clinical, and policy domains.  His work spans multiple overlapping domains, including: medical informatics and healthcare information systems, hospital management and operations, healthcare policy and regional public health, health promotion and community health, and application of data science and AI to medical / welfare / public-health systems.