This is a chemistry problem book for the Examination for Japanese University Admission for International Students (EJU). Published by Kōchi Gakuen (COACH ACADEMY), this textbook contains numerous carefully selected problems analyzed for their tendency to appear on the exam. It is organized by subject area and difficulty level, focusing on original new problems, making it ideal for efficient practice and strengthening weak areas. The content is updated annually to keep up with the latest exam trends. This book is recommended for those planning to take the EJU science (chemistry) section.