This book constitutes the refereed proceedings of the 15th IFIP TC 9 International Conference on Human Choice and Computers, HCC15 2022, in Tokyo, Japan, in September 2022.The 17 full papers presented were carefully reviewed and selected from 32 submissions.

Promoting Worker Wellbeing in the Era of Data Economy.- Privacy of Employees in Internet of Things Ecosystems.- The Use of Live Facial Recognition Technology .- Repair of Unstable Sociomaterial Relations.- Autonomy Alliances and Data Care Practices.- An Analysis Between SNS and Social Capital Types in Japan.- Possible Utilization of Personal Data and Medical Care.- Examining the effect of web advertising on pupil size.- Behind the Data: Screening for Mental Issues.- Digital–sustainable co-transformation.- Don’t be caught unaware: A Ransomware Primer.- A Study on AI Creations and Patent Law Protection.- General Monitoring and Constructive Knowledge?.- Comparison of Legal Systems for Data Portability.- Regulatory Frameworks in Developing Countries.- Application of International Law to Cyber Conflicts.- Privacy Protection during Criminal Investigations.