Hidejirō Nagata (永田秀次郎, Nagata Hidejirō, July 23, 1876 – September 17, 1943), was a politician and cabinet minister in the Empire of Japan, serving as a member of the House of Peers of the Diet of Japan, twice as a cabinet minister, and also serving twice as mayor of Tokyo.

From April to October 1916, Nagata was appointed governor of Mie Prefecture, returning afterwards to the Home Ministry to head the Public Security Bureau.

In 1926, he published a book titled Return to the Spirit of the Founding of the Japanese State, to help promote the new national holiday of National Foundation Day, which he had helped create two years previously through lobbying effects of a right-wing organization which he led.

[3] For Nagata, it was essential that Tokyo host the 1940 Olympics, as the date coincided with the Japanese 2600th Anniversary celebrations.

From March 9, 1936 to February 2, 1937, Nagata was appointed Minister of Colonial Affairs under the Kōki administration.