Masago Central Library, Public library in Bunkyo, Japan

Masago Central Library is a public library in Bunkyo with three floors organized into distinct areas for children, young adults, and general readers. The building houses specialized research facilities alongside its main collection.

The library sits in a district shaped by literary and publishing activity that began in the Meiji period. This heritage of writers and publishing houses left a lasting mark on how the area developed.

The library's name comes from the Masago district of Hongo, where it stands. Of the eight libraries and three reading rooms in the Bunkyo City library system, it alone is run directly by the ward office rather than a designated manager, a role it kept when the other seven libraries and three rooms were delegated in 2010.

The library is in Hongo, Bunkyo, and is open 9:00–21:00 on weekdays and Saturdays, and 9:00–19:00 on Sundays, holidays and 29 December. It closes on the fourth Monday of each month (open instead if that Monday is a holiday, closing the next day) and from 30 December to 4 January. There are 224 seats.

Masago Central Library is the only one of Bunkyo's eleven library sites still run directly by the ward, after the other seven libraries and three reading rooms were placed under a designated manager in 2010. Its 224 seats and roughly 195,000 general-volume collection make it the network's central reference point.