The National Diet Library strives to achieve the following seven goals under the slogan:
"Through knowledge we prosper"

• Enhance our legislative support function by improving services for the National Diet
• Make an exhaustive collection of results of intellectual activities in Japan to preserve them as common resources of the nation
• Provide prompt and precise access or links to information needed by users
• Seek to provide equally good service to all users regardless of where they are
• Offer a variety of appealing services to society and increase NDL’s visibility
• Promote closer cooperation with libraries of various kinds in Japan including public libraries
• Try to share and exchange information by maintaining close relationships with overseas libraries

* The Former Vision was replaced by "Mission and Objectives 2012-2016" in July 2012.