The National Diet Library Online Search and Request Service (NDL Online) is the catalog of library materials and digital contents at the National Diet Library in Japan.

Scope of the search

• Library materials
  • Includes books, periodicals, newspaper or magazine articles (the Japanese Periodicals Index), Japanese and Chinese old materials, maps, materials on the Allied Occupation of Japan, standards, technical reports, etc.
• Digital contents
  • The NDL Digital Collections, E-Books, E-Journals, etc.
• Materials for persons with print disabilities
  • Audio recordings of academic literature produced by the NDL, etc.
• Subject information
  • Contents database (Research Navi)