• What is the Legal Deposit System?

    The legal deposit system mandates that copies of all new publications published in Japan must be sent to the National Diet Library.

  • The Colorful World of Digital Collections

    The NDL Digital Exhibitions features the NDL's unique collections with explanations covering various themes such as nishiki-e, landscape photographs and historical materials. Discover your favorites!

  • Handing down records
    of earthquake disasters
    to future generations

    The NDL collects, preserves and provides records in cooperation with various organizations.

  • Archiving websites for the future

    Information on the Internet is updated frequently, and websites come and go just as quickly. To counter the ephemeral nature of information on the Internet, the National Diet Library regularly collects and archives websites to preserve their content for the future.

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Events list

Library Calendar

  • Tokyo Main Library

    Jun. 2020
    Library Holiday
    1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 14th, 17th, 21st, 28th
    SunMonTueWedThuFriSat
    123456
    78910111213
    14151617181920
    21222324252627
    282930
    Jul. 2020
    Library Holiday
    5th, 12th, 15th, 19th, 23rd, 24th, 26th
    SunMonTueWedThuFriSat
    1234
    567891011
    12131415161718
    19202122232425
    262728293031
  • Kansai-kan of the NDL

    Jun. 2020
    Library Holiday
    1st, 2nd, 3rd, 7th, 14th, 17th, 21st, 28th
    SunMonTueWedThuFriSat
    123456
    78910111213
    14151617181920
    21222324252627
    282930
    Jul. 2020
    Library Holiday
    5th, 12th, 15th, 19th, 23rd, 24th, 26th
    SunMonTueWedThuFriSat
    1234
    567891011
    12131415161718
    19202122232425
    262728293031
  • International Library of Children's Literature

    Jun. 2020
    Library Holiday
    1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 15th, 17th, 22nd, 29th
    SunMonTueWedThuFriSat
    123456
    78910111213
    14151617181920
    21222324252627
    282930
    Jul. 2020
    Library Holiday
    6th, 13th, 15th, 20th, 23rd, 24th, 27th
    SunMonTueWedThuFriSat
    1234
    567891011
    12131415161718
    19202122232425
    262728293031