[dwg]

Generally true to my knowledge, but I believe University of Tokyo and a few other top universities are an exception, especially in the sciences.

[santaclaus]

Tokyo University puts out some seriously badass researchers. Think Caltech, MIT, and ETH Zürich quality.

[aerioux]

Sorry in what field? I would argue the number of these (as a %) on average are much lower (metric: top tier publications)

Also if you're looking at Asian univs, Tsinghua, Peking, SNU, NUS, KAIST and (CUHK/HKUST) should be there too ;)