This book looks at innovative tools developed by Japanese and Korean researchers and practitioners to tackle cyberbullying and internet-related problems (addiction, cybercrimes, etc.). The contributors have created preventative and intervention measures for children using games, apps, manga and anime videos, which are more accessible for children than textbooks or classroom-based lessons. The contributors cover their experiences of developing these new approaches with children, parents and teachers as well as giving insights and evidence into how these innovative techniques and methods work. By sharing their expertise, the authors hope to contribute to further improvements of games, apps, manga and anime and to improve the safety of children online.