Mizuno clan
Following the creation of the Tokugawa shogunate, Okazaki Domain was created, and Ieyasu’s close retainer Honda Yasushige was assigned possession of the castle. A three-story "donjon" was completed in 1617. The Honda were replaced by the Mizuno clan from 1645-1762, and the Matsudaira (Matsui) clan from 1762-1769. In 1769, a branch of the Honda clan returned to Okazaki, and governed until the Meiji Restoration.