Answer: They dedicated military expenses trying to conquer Korea.
Step-by-step explanation: Medieval Japan happened between the years 1185 to 1600 it had feudal structures.Toyotomi Hideyoshi unified the nation in 1590 and launched two unsuccessful invasions of Korea. The Japanese initial invasion of Korea was in the year of 1592, then there was a brief truce in 1596, and then there was a second invasion in the year of 1597. The conflict ended in 1598 with the withdrawal of the Japanese forces and it marked the end of the Joseon dynasty's early period in Korea.