The six-volume set constitutes the refereed proceedings of the 32nd International Conference on Neural Information Processing, ICONIP 2025, held in Okinawa, Japan, in November 2025.  The 197 full papers presented in this book were carefully selected and reviewed from 1092 submissions. The conference focuses on three main areas, i.e., Theory and Algorithms, Computational Neurosciences, and Applications and Frontiers.