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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.

Days Closed

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
  • April 2023
    Library Holiday
    2nd, 9th, 16th, 19th, 23rd, 29th, 30th

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

Library Open Hours

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."

Opening hours 9:30-19:00 (17:00 on Saturday)
User Registration 9:20-18:30 (16:30 on Saturday)
Requests for closed stack materials 9:30-18:00 (16:00 on Saturday)
Same-day Photoduplication Requests (Printouts of electronic resources on the same day) 10:00-18:00 (16:00 on Saturday)
Later date photoduplication requests (sent by mail) 10:00-18:30 (16:30 on Saturday)
Coffee shops & Shop
(Main Bldg. 6th Floor)
6th floor cafeteria closed on October 20, 2020.
Box lunches are available in the former cafeteria space on weekdays only as well as at the shop on the 6th floor of the Main Building. Patrons may use the former cafeteria space to eat or drink food and beverages that they have brought with them from 11:00-18:00 weekdays or 11:00-17:00 on Saturdays.
Light meals are also available at the coffee shops on the 3rd floor of the Main Building and the 1st floor of the Annex.
* Please remember that there are no lunches for sale in the former cafeteria space on Saturdays.
(Main Bldg. 6th Floor)
9:30-18:00 (17:00 on Saturday)
Coffee shop
(Main Bldg. 3rd Floor)
* Orders will be taken until 20 minutes before closing time.
Coffee shop
(Annex 1st Floor)
* Orders will be taken until 15 minutes before closing time.
* Closed on 1st, 3rd and 5th Saturday.
* You can also eat your box lunch here.

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