The eProceedings for HCC15 have been published and are now available from Springer.
Human Choice and Digital by Default: Autonomy vs Digital Determination 15th IFIP TC 9 International Conference on Human Choice and Computers, HCC15 2022, Tokyo, Japan, September 8-9, 2022, Proceedings Cham, Switzerland: Springer International
(eds.) Kreps, D., Davison, R., Komukai, T., Ishii, K.
https://doi.org/10.1007/978-3-031-15688-5