松平定信
In 1827, he completed the "Nihon Gaishi", his life work, It was modeled on the "Records of the Grand Historian" and was in 22 volumes, covering Japanese history from the emergence of the Minamoto clan through the reign of Tokugawa Iemitsu. It was the first comprehensive study of its kind. The work was dedicated to the "daimyō", Matsudaira Sadanobu, who praised it and presented it to the shogunate for approval. Despite winning that approval, it was later banned in several domains, possibly because it advocated strengthening the powers of the Emperor. It has been cited as a major influence on the "Sonnō jōi" movement.