Iki Island
Hideyoshi mobilized his army at Nagoya Castle, located in the old Hizen Province on Kyushu, newly built for the sole purpose of housing the invasion forces and the reserves. None of the original structures remain, but the castle's ruined foundations survive in the formerly separate town of Chinzei, now part of the city of Karatsu in Saga Prefecture. The first invasion consisted of nine divisions totaling 158,800 men, of which the last two of 21,500 were stationed as reserves on Tsushima Island and Iki Island, respectively. The Japanese used a total of 320,000 troops throughout the entire war.