Nariaki was put in charge of Bakufu efforts to defend the country against encroaching foreigners. His own view was that the bakufu should strengthen its military and fight the foreigners, and was at odds with Ii Naosuke on the issue. He was pro-emperor and favored imperial restoration. Nariaki also greatly expanded the Mitogaku school established by Tokugawa Mitsukuni. He wrote a document entitled "Japan, Reject the Westerners" in 1853. in this document, he stated ten reasons why Japan should stay isolated from the rest of the world. He said that the Japanese people had a choice between war and peace, but clearly to him, the Japanese people should choose war so that Westerners would not intrude into Japan's affairs.