Tokyo University, Kyoto University, hitotsubashi university, Osaka University, Tohoku University, tokyo institute of technology (this is also a kind of national university).

If you count private schools, you add Keio University and Waseda University.

Except Tokyo University and Kyoto University, Osaka University and Tohoku University are similar, depending on the major. Kobe University, Nagoya University, Kyushu University and Hokkaido University are all established imperial universities, and the ranking is of little significance. Then there are La Traviata University, Yokohama National University, Hiroshima University and sophia university, which are also famous universities.