Hideyoshi Toyotomi built Nagoya Castle in Chinzeicho, Saga Pref., as his base for his invasion of Korea (1592-1598). The castle is said to have been completed by the four-month rush work. Now only the surrounding camps constructed by Hideyoshi’s feudatories remain and have been conserved as the Encampment Sites. The castle’s area was almost equal in size to Osaka Castle. As the foundation stones of the castle were brought from the beach, a lot of rocks with seashells adhered to them can be found. As the technique used for stone masonry was excellent, this desolated site is visited by many researchers and engineers. Hideyoshi stayed at this castle for only 1 year and 3 months between the two wars. The castle was scrapped after the war ended. Later Takahiro Terasawa, the domain lord of Karatsu Province, took over some of the building materials and used them to build Karatsu Castle. The Otemon (main gate) was brought as far away as to Sendai in Tohoku region by Masamune Date, who used it as the Otemon of his castle’s Ninomaru (the second circle). The Nagoya Castle Site and the Encampment Site are well conserved as the designated national historic landmarks. Nearly 160 feudal lords from all over Japan gathered to join the wars, among them were many notable figures such as Masanori Fukushima, Toshiaki Maeda, and the man who became another “Tenkabito (a person in paramount authority)”, Ideas Tokugawa.