• 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
• Makoto Kato Collection of art exhibition catalogs
• Nunokawa Collection
• Verner W. Clapp Collection

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