SLA literature tends to focus predominantly on what motivates language learners, but what demotivates them has not been widely discussed. This book, focusing exclusively on demotivation, will help readers to understand motivational issues from a different perspective. The research presented in this book is situated in Japanese English-teaching contexts and will serve as a foundation for anyone wishing to better understand the causes of demotivation in SLA and to explore the topic in their own contexts.