To enter the Library, it is necessary to agree to the Instructions for the On-site Use of the National Diet Library.

The opening hours of the National Diet Library are different between the Tokyo Main Library, the Kansai-kan, and the ILCL. Please make sure of the opening hours before visiting. Also considering the time needed to find material titles and call numbers, your sufficiently early visit is recommended.

• *Visitors are not allowed to carry into the Library bags, envelopes or any other opaque containers 7x10 inches (17x25cm) or larger. There is no size restriction to transparent bags and acrylic cases, in which you are recommended to put writing instruments, purses, valuables.
• *Please turn cell-phones to silent mode in the NDL building and speak on them only in the designated areas.
• *Personal computers, word processors, sound-generating pocket calculators may be used in certain designated sections of the Library. Outlets are available.
• *Smoking is only allowed in the designated smoking room. In the ILCL, it is totally prohibited.
• *Visitors carrying a lunch box or other foods with them may eat in the designated area. Eating and drinking while using library materials are prohibited at all times.

Anybody 18 years of age or older from any nation can visit and use the Tokyo Main Library and the Kansai-kan. In the case of the ILCL, people under the age of 18 can also use many materials and services of it (there are also reading rooms for research only available for anyone 18 and older).

The user card is required when searching, requesting receiving, returning and having materials photocopied; you should not lose or damage it. (Caution! Do not leave your user card in the user terminals, etc.). Please notify the staff at the nearest counter or at the Entrance Counter if the card is lost.