Toyo Bunko

This specialized library and research center for East Asian studies was first established in 1924 by Hisaya Iwasaki, the third president of Mitsubishi.
This site is considered one of the world's five major research libraries for East Asian studies, and it houses close to 1 million books, which includes 5 national treasures and 7 important cultural properties among the collection.
There is also a museum shop and cafe on-site, as well as a lush green courtyard area to check out.