Genghis Khan was the founder and first Great Khan of the Mongol Empire, which he ruled from 1206 until his death in 1227. He conquered a vast territory that extended from Asia to Europe, and his empire became one of the largest empires in history. However, he never conquered Japan.
There are a number of possible reasons for this. Firstly, the Mongols lacked a navy, and Japan is an island country. Secondly, the Mongols may have judged that the cost of conquering Japan would outweigh the benefits. Thirdly, the Japanese were fairly isolated from the rest of the world at that time and may have been less vulnerable to attack. Finally, Khan died in 1227, before he had a chance to launch an invasion of Japan. Although he didn’t conquer Japan, Genghis Khan was one of the most successful military leaders in history, and his empire had a lasting impact on the world.