HOTEL OKURA TOKYO BOOK STORE
There is a nice small book shop in Hotel Okura Tokyo. The nearest train station is Kamiyacho of Hibiya Line Metro.
I am sorry they do not have much books for all fields; however, If you would like to know Japan and Japanese culture, they have a lot of beautiful and interesting books.
Afeter you pick up some books, there are nice delicious restaurants in Hotel. Additionally, you enjoy shopping mall in the hotel.