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Library Hours and Holidays

Days Closed

Sundays, National holidays, year-end and New Year's holidays, third Wednesday of every 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 X account.

Opening Calendar

  • April 2025
    Library Holiday
    6th, 13th, 16th, 20th, 27th, 29th
    SunMonTueWedThuFriSat
    12345
    6789101112
    13141516171819
    20212223242526
    27282930
  • May 2025
    Library Holiday
    3rd, 4th, 5th, 6th, 11th, 18th, 21st, 25th
    SunMonTueWedThuFriSat
    123
    45678910
    11121314151617
    18192021222324
    25262728293031

For the yearly schedule of days the library is closed, see the "Library Calendar".

Hours of Service

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 X account.

Library hours9:30 - 18:00
Reader serviceReading hours9:30 - 18:00
Request for closed stack materials (registered users only)10:00 - 17:15
Inter-site request service (registered users only)9:30 - 17:30
Photoduplication service Same-day photoduplication service 9:30 - 17:00
Printouts of electronic materials9:30 - 17:00
Self-service photoduplication 9:30 - 17:30
Later date photoduplication (registered users only)10:00 - 17:45
Reference service9:30 - 18:00
User registration9:30 - 18:00
Cafeteria11:00 - 13:30
Vending machine area9:30 - 18:00

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