After the establishment of the Tokugawa shogunate, Niwa Nagashige was transferred from Tanagura Domain to become daimyō of the newly created 100,000 koku Shirakawa Domain in 1627 and completely rebuilt and expanded Komine Castle between 1628 and 1632.
Following the founding of the Tokugawa shogunate, Niwa Nagashige was reassigned from Tanagura Domain to govern the newly formed Shirakawa Domain in 1627. He then invested considerable time and resources between 1628 and 1632 in rebuilding Komine Castle.