We invite all members of the international computer communications and networking community to submit their works to the 40th International Conference on Information Networking to be held in the beautiful city of Hanoi, Vietnam from January 14-16, 2026. ICOIN is organized by the Korea Institute of Information Scientists and Engineers (KIISE). It is technically co-sponsored by IEEE and IEICE (pending). Since its inception as the Joint Workshop on Computer Communication in 1986, ICOIN has been the most comprehensive conference on advances in computer communication and networking technologies for 40 years. Computer communication and networking technologies have changed every aspect of our lives and society. International Conference on Information Networking 2026 will continue to play a pivotal role in the new IT paradigms which will influence various sectors of society in the future. Authors are invited to submit original, unpublished manuscripts that demonstrate recent advances in computer communication, wireless/mobile networks, and converged networks from both theoretical and practical perspectives.