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
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 -
May 2025
- Library Holiday
- 3rd, 4th, 5th, 6th, 11th, 18th, 21st, 25th
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
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 hours | 9:30 - 18:00 | |
| Reader service | Reading hours | 9:30 - 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 materials | 9:30 - 17:00 | |
| Self-service photoduplication | 9:30 - 17:30 | |
| Later date photoduplication (registered users only) | 10:00 - 17:45 | |
| Reference service | 9:30 - 18:00 | |
| User registration | 9:30 - 18:00 | |
| Cafeteria | 11:00 - 13:30 | |
| Vending machine area | 9:30 - 18:00 | |