 He fought in the Boshin War, finally surrendering to the Meiji government after the fall of the Republic of Ezo.The final daimyō of Kuwana, Matsudaira Sadanori, was still a child during the Boshin War.He capitulated Kuwana Castle to the Satchō Alliance forces without a battle.He was later educated in the United States and joined the Meiji government, serving as Japanese ambassador to Italy.