Kublai khans invasion of japan failed for two reasond. name them

From a military perspective, the failed invasions of Kublai Khan were the first of only three instances when the samurai fought foreign troops rather than amongst themselves; the others being Japanese invasions of Korea (1592–98) and the Japanese invasion of Ryukyu (1609).

OK my friend so basically the two of the reasons were that a huge typhoon had swept away most of the invading fleets and also another reason was the Kamakura Shogunate 

The growth of the empire continued to increase their confidence.