Nihonmatsu Domain
In 1627, Niwa Nagashige, one of Tokugawa Ieyasu’s generals, was transferred from Tanakura Domain to the newly established Shirakawa Domain, with a "kokudaka" of 100,700 "koku". He built Komine Castle, and established the surrounding castle town. He was followed by his son, Niwa Mitsushige in 1637, but the clan was transferred to Nihonmatsu Domain in 1647.