The Japanese publications housed in the NDL make up a comprehensive collection of all the materials published in Japan, which are acquired through the Legal Deposit System, and its catalogues are an accumulation of the national bibliographies that have been compiled on a weekly basis.
国立国会図書館の所蔵する国内出版物は納本制度を通じて収集された日本国内の出版物の網羅的コレクション、その目録は週刊でまとめられてきた全国書誌の集積である。