尊王攘夷
In 1802, he was born the son of Usami Sukenaga (宇佐美 祐長), a samurai of Kii Domain, and he became an adoptive son of his uncle, Date Moriaki (伊達 盛明). He inherited a patrimony by 12 years old, and was appointed "Kansatsu (監察)" by 18 years old. He assisted Karō of Kii Domain, and promoted the reform of that domain, and took the lead in the "Sonnō jōi" movement. In 1852, he was arrested by an opponent for his dangerous "Sonnō jōi" activity and was imprisoned for nearly 10 years in the town of Tanabe (紀伊 田辺). In 1861, he was released by the agency of Yamanouchi Yōdō (山内 容堂), who was a "daimyō" of Tosa Domain (土佐). He transferred his patrimony to his adoptive son, Date Muneoki （伊達 宗興） and retired. But he returned to the Sonnō jōi movement with Muneoki. They were arrested by Kii Domain officials, and were imprisoned again in 1865. After the Meiji Restoration, he was released in 1869. In his later years, he lived in Fukagawa, Tokyo with his son, Mutsu Munemitsu.