Easy Japanese" is a Japanese language that incorporates simple grammar and easy-to-understand vocabulary. It was created with the aim of providing accurate information to foreigners living in Japan during disasters. Currently, many foreigners live in Japan, and with the increasing number of foreign workers, it is expected that people from a variety of countries, languages, and cultures will continue to live in Japan. "Easy Japanese" is expected to be effective not only in times of disaster, but also in everyday communication (peaceful times), and is already being put into practice and attracting attention from government and media. This book provides easy-to-understand explanations of the history of "Easy Japanese," the current state of Japanese language education, and multicultural coexistence. It also provides examples of techniques for paraphrasing and rewriting words into "Easy Japanese" based on actual situations that arise in schools, PTAs, daycare centers, government agencies, and everyday life. This encyclopedia aims to encourage reading, reflection, and practice on language issues involving people from various walks of life in society.