The Edo-Tokyo Museum Library is the specialist library of a museum that opened in 1993, and that has a particular focus on the history and culture of Tokyo (known in pre-modern times as Edo). It houses a collection of books, documents, secondary materials and microfilms covering history, performing arts, customs and traditions, architecture, literature and much else. The Library’s holdings are a part of the Museum’s collections; we record them and store them, making them available for public consultation on the understanding that they are objects to be treated with care, preserved for future generations, and may also be used in the museum exhibitions. At the same time, we also make a point of collecting art exhibition catalogues, and we have characteristics of an art library. On the eve of our 20th anniversary our operations are due for a review, but here I will concentrate on giving a brief summary of our activities.