Japan and the California Problem is an essay that explores the complex relationship between Japan and the state of California in the 19th century. Authors Toyokichi Ienayaga and Kennosuke Sato examine in detail the historical events that influenced the interaction between these two territories, and also analyze the political, economic, and cultural aspects of the issue. The book reveals important aspects of the colonial era and the interaction between the Eastern and Western worlds, providing a unique perspective on the historical ties between Japan and California. This work is an important source of knowledge for those interested in the study of intercultural relations and the history of the mutual influence of different countries and cultures.