"Teaching Japanese with Content-Based Instruction (CBI)" is a comprehensive textbook that explores the application of Content-Based Instruction (CBI) in the field of Japanese language teaching. CBI is regarded as one of the leading teaching methods in foreign language education, as it promotes the integration of language and content learning. This book examines the claims that CBI enhances critical thinking skills, self-directed learning abilities, and learner motivation. It provides a well-founded analysis of the effectiveness of CBI compared to hybrid and traditional teaching approaches. Through qualitative and quantitative research findings, it offers deeper insights into the impact of CBI on learning Japanese. The author, Akemi Morioka, highlights the challenges and opportunities associated with this teaching method and provides valuable insights for educators and learners in the field of the Japanese language.