 Mitsutaka died in 1645 at the age of 29, leaving the domain in the hands of his 3-year-old son, and by order of the Tokugawa shogunate, Tsunanori's uncle, Maeda Toshitsune was named regent.Tsunanori was called Matsudaira Inuchiyo-maru in his youth, He underwent the "genpuku" ceremony in 1654, with "Shōgun" Tokugawa Ietsuna presiding and was awarded Senior 4th Rank, lower grade and the courtesy title of "Sakonoe-shosho" and "Kaga-no-kami" at that time.In 1658, he was wed to Suma-hime, the daughter of Hoshina Masayuki of Aizu Domain.