As a student here my opinion is very biased, so let's just talk about the architecture of Mita Campus.

It is old, dating back to 1860s, if not older. The campus has been through several renovations, and unfortunately almost all of the original structures are gone. Except for Mita Enzetsukan and a huge ginko tree which is even older than the university itself!

The second oldest building is the Old Library, a piece of Gothic architecture built in red brick. It was originally built in 1919 if I'm not mistaken, but has been through several renovations, since it was destroyed during WWII when the campus was bombarded. Latest renovations started a few years ago, and were originally planned to end in June 2020, but idk how far they have progressed with the Covid-19 situation.

The campus was rewamped after WWII by Isami Noguchi and Taniguchi Yoshio. But alas all of these buildings are also gone. They were not built to withstand earthquakes. Ever since many different architects and recently architectural companies have taken charge of rebuilding the Mita Campus. This resulted in the lack of harmony. Nevertheless, the campus has some interesting pieces of architecture, old and new. It is beautiful and contains around 200 years of history, not to mention the many centuries before when it served as the estate of a Japanese Feudal Lord (daimyo).

It is usually open to public, so if you ever find yourself in Mita do come around!