The Tokyo Metropolitan Library promotes library services in two libraries;
The Central Library and the Tama Library.

The Tokyo Metropolitan Central Library is a library to support surveys, research and finding solution for the residents of Tokyo. The Tokyo Metropolitan Tama Library offers a variety of magazines and services for children and youth.　These two Metropolitan Libraries propel the services with close cooperation.

There are 2.3 million volumes in the libraries.The proportion of foreign language books is about 10%, and an eminent collection in Tokyo.