Question: how old are middle schoolers in japan?
Answer: The usual schooling in Japan is 6 years of primary school (from the age of 7 to 12), 3 years of junior high school(from the age of 13 to 15), 3 years of senior high school (from the age of 16 to 18), and 4 years of university education(from the age of 19 to 22).