Lord Keeper of the Privy Seal of Japan

The Lord Keeper of the Privy Seal of Japan (内大臣, Naidaijin^?) was an administrative post not of Cabinet rank in the government of the Empire of Japan. The Lord Keeper of the Privy Seal was responsible for keeping the Privy Seal of Japan and State Seal of Japan.

The office of the Lord Keeper of the Privy Seal was identical with the old Naidaijin only in name.

The office of Naidaijin (literally "Inner Minister") was an ancient title predating the Taihō Code of 701. Fujiwara no Kamatari was the first person appointed to the post in 669. After the appointment of Fujiwara no Michitaka in 989, the office became permanently established, ranking just below that of Udaijin (Minister of the Right) and Sadaijin (Minister of the Left).

The modern office was established in 1885, after the Meiji government established the cabinet; however, the Lord Keeper of the Privy Seal was separate from the cabinet, and acted as a direct, personal advisor to the Emperor. He was also responsible for the administration of imperial documents such as rescripts and edicts. Petitions to the emperor and the court were also handled by the Lord Keeper's office, as well as the responses.

When the Privy Council was created in 1888, the Privy Seal retained his independent advisory role. The term "privy" in Privy Council and Privy Seal identifies a direct relationship of special trust.

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