Opening Hours & Library Holidays

To help prevent the spread of COVID-19, admission will be restricted when the library becomes crowded. The maximum number of simultaneous visitors is approximately 1,000. After that, patrons will be allowed to enter the library after someone else leaves.

Please see below for details.

• Attention! Information for Visitors to the Tokyo Main Library

Sundays, National holidays, the year-end and New Year's holidays and the third Wednesday of the month (for refiling).

Additionally, the Library could be closed without prior notice in case of natural disasters or other public emergencies. Announcements are posted on the National Diet Library website and our official Twitter account.

• *To use the Rare Books and Old Materials Room on service Saturdays, it is necessary to make a reservation.

• March 2023

  Library Holiday

  5th, 12th, 15th, 19th, 21st, 26th

  Sun	Mon	Tue	Wed	Thu	Fri	Sat
  			1	2	3	4
  5	6	7	8	9	10	11
  12	13	14	15	16	17	18
  19	20	21	22	23	24	25
  26	27	28	29	30	31

• April 2023

  Library Holiday

  2nd, 9th, 16th, 19th, 23rd, 29th, 30th

  Sun	Mon	Tue	Wed	Thu	Fri	Sat
  						1
  2	3	4	5	6	7	8
  9	10	11	12	13	14	15
  16	17	18	19	20	21	22
  23	24	25	26	27	28	29
  30

For the yearly schedule of Library closure, please see the Library Calendar.

Regular library hours are as follows.

Additionally, the National Diet Library is sometimes forced to change its library hours temporarily due to weather impacts on traffic conditions. Announcements are posted on the National Diet Library website and our official Twitter account.

*Some special materials rooms have different service hours. For more information, please see the guide, "Special Materials Rooms and Reading Rooms."