Though these events caused the Takeda family to lose some of its power and influence, it remained intertwined with the ruling class of Japan. More importantly, the move to Aizu and subsequent events profoundly shaped what would emerge as Daitō-ryū Aiki-jūjutsu in the 19th century. One important event was the adoption of Tokugawa Ieyasu's grandson, Komatsumaru (1611–1673), by Takeda Kenshoin (fourth daughter of Takeda Shingen). Komatsumaru devoted himself to the study of the Takeda family's martial arts, and was subsequently adopted by Hoshina Masamitsu. Komatsumaru changed his name to Hoshina Masayuki (保科 正之), and in 1644 was appointed the governor of Aizu. As governor, he mandated that all subsequent rulers of Aizu study the arts of Ono-ha Ittō-ryū (which he himself had mastered), as well as the art of "oshikiuchi", a martial art which he developed for shogunal counselors and retainers, tailored to conditions within the palace. These arts became incorporated into and combined with the Takeda family martial arts.