When was Nagoya Castle created?
Nagoya Castle
In January 1610 (Keichō 15), the site was roped off and work began. Tokugawa Ieyasu ordered various daimyōs to help with the construction of what was to become the new capital of the existing Owari Province. Katō Kiyomasa, Fukushima Masanori, and Maeda Toshimitsu were among the 20 feudal lords from the northern and western part of Japan who were assigned to assist in the project. The inscriptions of feudal lords and their vassals, carved on the stones they carried, are still visible today. In August 1610 the stone foundation of the main donjon (tenshu) was completed, and by December construction of the stone walls for the Honmaru, Ninomaru, Nishinomaru, and Ofukemaru buildings was almost finished. In June 1611 (Keichō 16) a canal that today is the Hori River was built. The source for much of the building material for the new castle was the smaller Kiyosu Castle, including its tenshu, which was rebuilt as the northwest turret. In mid-1612 (Keichō 17), the construction of Honmaru Palace began, and the main donjon was completed in December of that year.
Katsuyama Castle
Per the "Shinchō kōki", Katsuyama Castle was built in 1579 by Shibata Katsuyasu, a relative of Shibata Katsuie, one of Oda Nobunaga's leading generals, and Hara Nagayori was assigned as its castellan. The Shibata clan were destroyed in conflicts with Toyotomi Hideyoshi, and after the Battle of Sekigahara, the entire province of Echizen was assigned by Tokugawa Ieyasu to his second son, Yūki Hideyasu in 1601 as Fukui Domain. In 1624, Fukui Domain was divided, with Yūki Hideyasu's fifth son, Matsudaira Naomoto being awarded a 30,000 "koku" fief centered at Katsuyama. This became Echizen-Katsuyama Domain. Matsudaira Naomoto was transferred to Ōno Domain in 1635, and was replaced by his younger brother, Matsudaira Naoyoshi, who was in turn transferred to Ōno Domain in 1644, at which point the domain became part of the tenryo territories under direct control of the shogunate.