Okay kiddo, so a long time ago, in the late 1500s, Japan decided they wanted to conquer their neighbors in Korea. They wanted to take control of their land, people, and resources.
The Japanese army was very big and they had lots of soldiers with sharp swords and powerful guns. They sailed across the sea and landed in Korea.
When they arrived, the Korean people were very scared because they had never seen an army as big as the Japanese. But the Korean army was very strong too, and they fought back. They used their own swords and guns to defend their land.
The war went on for six years, and it was very long and tiring for both sides. Lots of people were hurt and killed, and many cities and villages were destroyed.
After a while, the Japanese started to get tired of fighting and realized they couldn't take over Korea. They decided it wasn't worth it and went back to Japan.
The Koreans were very happy that they won the war, but they had to rebuild their cities and homes from all the damage that had been done.
So, that's the story of the Japanese invasions of Korea. It was a sad and scary time, but in the end, the Koreans stood up for themselves and protected their homeland.