Hoshina Masatsune

 was the 2nd "daimyō" of Aizu Domain in Mutsu Province, Japan (modern-day Fukushima Prefecture). His courtesy title was "Chikuzen-no-kami" and "Jijū", and his Court rank was Senior Fourth Rank, Lower Grade.
Biography.
Masatsune was the fourth son of Hoshina Masayuki and became "daimyō" in 1669 on the retirement of his father. He understood the construction of his father's monumental grave at Hanitsu Jinja in Inawashiro in 1675. He is also known for reviving the Oyaku-en, a medicinal herbs garden which had been established by the Ashina clan during their tenure over Aizu. However, his tenure was a constant struggle against the machinations of his mother, Shoko-in (1620-1691), who wielded a strong influence and promoted less-than-qualfied relatives to various high posts, including that of "karō". He was married to a daughter of Maeda Toshitsune of Kaga Domain, but had only one daughter. He adopted his younger brother, Matsudaira Masakata as his heir and died in 1681.