Different evaluation criteria: QS ranking is a comprehensive evaluation based on multiple dimensions, including academic reputation, employer satisfaction, paper citation rate, teacher-student ratio and so on. The weight of these standards and the specific scoring standards may vary from school to school, resulting in different scoring results.

Statistical differences: QS ranking is a comprehensive evaluation based on the performance of the school in the past few years. Therefore, there may be differences in data statistics methods and data update time in different schools, which will also lead to differences in scoring results.

However, in the QS ranking, Johns Hopkins University and Tokyo University rank the same, which may be because they use the same evaluation criteria and statistical methods in the ranking, which leads to their same position in the ranking. It should be noted that the ranking is only a reference to the comprehensive strength of schools, and the advantages and disadvantages of different schools may be different in all aspects, so choosing a school that suits you should be considered according to your own needs and interests.