"Nagao Library and Collections"in Fukakusa Library owns more than 70% of the records of Japanese companies' history, issued from the last days of the Tokugawa shogunate to 1985, and it has now about 16,800 pieces of materials including the added collections.
深草図書館「長尾文庫・コレクション」は、幕末から1985年までに刊行された社史の70%以上が収集されており、現在、追加収集を含め約16,800点を所蔵。