The Japanese ruler Toyotomi Hideyoshi launched an attempt to conquer Ming China in 1591 with an invasion of Korea .
The Japanese ruler Toyotomi Hideyoshi was defeated , in large part as a result of naval defeats at the hands of the Korean admiral Yi Sunshin .
The Japanese ruler Toyotomi Hideyoshi launched an attempt to conquer Ming China in 1591 with an invasion of Korea , but was defeated , in large part as a result of naval defeats at the hands of the Korean admiral Yi Sunshin .