• Catalogs of Old Japanese Books and Chinese Books
• Collections of International Library of Children's Literature, National Diet Library
• Digital Archives of Cultural Institutions in Asia
• Digital archives which allow easy secondary use (Libraries in Japan)
• Digital archives which allow easy secondary use (Museums)
• Eiryo Ashihara Collection
• Gakken Bunko (Japanese Chinese Poetry and Writings)
• How to Search Rare Books and Old Materials
• Ito Bunko (Ito Collection)
• Kyubakufu Hikitsugisho (Handover Documents of the Former Shogunate)
• Makoto Kato Collection of art exhibition catalogs
• Nishiki-e (Ukiyo-e) of the Rare Books and Old Materials Room
• Nunokawa Collection
• Pre-Modern Illustrated Maps (*Ezu*) and Old Maps Held by the National Diet Library
• Ransho (Dutch Books) Collection
• Shirai Bunko (Shirai Collection)
• Verner W. Clapp Collection

More research guides and categories are provided in Japanese page of "The National Diet Library's special collections" etc.