Kinokuniya in Shinjuku
The best-known branch of this chain is on Shinjuku Dori, but the branch behind the nearby Takashimaya (on the south side of Shinjuku station) is bigger. Kinokuniya has perhaps the largest selection in Tokyo of new books in French and German, as well as English, with numerous specialised academic titles on offer too. It also carries numerous videos, audio-visual software and CD-Roms. Note that not all Kinokuniya branches sell English books.
From TimeOut Tokyo