This article explores the age requirements for attending a Japanese high school, as well as the benefits and challenges associated with doing so. Students must be at least 15 years old by April 1st of the year they plan to enroll, although there are exceptions for special circumstances. Japanese high schools offer an intensive educational experience with rigorous academic programs and strict rules regarding attendance and behavior. Attending a Japanese high school can provide numerous benefits for both local and foreign students alike, but there are also some challenges such as language barriers, cultural differences, limited access to extracurricular activities, bullying or discrimination based on ethnicity, etc.