Awareness of Complementary Knowledge in CSCL: Impact on Learners' Knowledge Exchange in Small Groups -- Identifying Socio-Technical Means to Support Small Loosely Coupled Groups of Volunteers -- The analysis of collaborative science learning with simulations through dual eye-tracking techniques -- Hybrid Meetings in the Modern Workplace: Stories of Success and Failure -- A CSCL script for supporting moral reasoning in the ethics classroom -- Tailorable Remote Assistance with RemoteAssistKit: A Study of and Design Response to Remote Assistance in the Manufacturing Industry -- Vision-Based Indoor Positioning (VBIP) - An Indoor AR Navigation System With A Virtual Tour Guide -- Developing Hyper-stories in the Context of Cultural Heritage Appreciation -- A Method for Automated Detection of Cultural Difference -- FootstepsMixer: a Tool to Express Multiple People's Footsteps in a Footstep Transmission System for Awareness Support -- Speech Speed Awareness System Slows Down Native Speaker's Talk -- A Comic-style Chat System with Japanese Expression Techniques for More Expressive Communication -- Modeling of non-verbal behaviors of students in cooperative learning by using OpenPose -- Implementing a Serious Game to Improve Communication and Social Skills for Children with Autism -- DiAna-AD: Dialog Analysis for Adjusting Duration during Face-to-face Collaborative Discussion -- Group Dynamics in Gameful Collaborative Innovation Processes -- Discovering Latent Country Words: A Step towards Cross-cultural Emotional Communication -- Evaluation of a campus navigation application using an AR character guide -- An Automated Structural Approach to Support Theatrical Performances by Introducing Gesture Recognition to a Cuing System -- Proposal of Emphasized Pseudo Expression for Improving the Recognition of the Presence and Contribution of Remote Participants in Cooperative Work.

This book constitutes the refereed proceedings of the 25th International Conference, CRIWG+CollabTech 2019, held in Kyoto, Japan in September 2019. The 12 full papers presented in this book together with 8 work-in-progress papers were carefully reviewed and selected from 28 submissions, and the program also included an invited talk. This year presented a merger of the CRIWG and CollabTech conferences after having been jointly held since 2014. The papers published in this proceedings focus on innovative collaboration technologies and social computing.