Kublai Khan failed to conquer Japan and Java.
egypt was too hot and japan had bad currents
Kublai Khan ruled China but he did not conquer it; he inherited the throne from his grandfather, Genghis Khan.
In 1279 Kublai Khan conquered all of China
Kublai Khan was unable to conquer Japan. His attempts to invade the country in the late 13th century were thwarted by strong resistance from the samurai and, notably, by typhoons that destroyed his fleet, famously referred to as "kamikaze" or divine winds. These failed invasions in 1274 and 1281 marked significant setbacks for his expansionist ambitions.
China
japan and china
he didn't, his grandfather (Ghengis Khan) did, he just ruled it
Japan!
Atilla the hun
He was unable to Conquer Germany.
Kublai Khan most likely ruled the same way as his ancestors. He was more known for his attacks on Japan. (Which ended in failure)