For English books, Bookoff in Jiyugaoka and Naka Meguro
Since the closure of Bookoff Cafe in Shiroganedai, the Bookoffs in Jiyugaoka and Naka Meguro are probably best equipped with English books. So it seems that these shops picked up most of the used books from Shiroganedai.
Jiyugaoka
It should be said that Jiyugaoka recently (February 2014), is offering bargain books for about 300 Yen, as it is looking to try to deplete their stock.
Steve
United Kingdom