the kublai khan was successful in conquering china, but in other effort was he clearly unsuccessful sending conquered Chinese fleets to conquer Japan.
Kublai, also known as the Emperor of Yuan in his temple and Setsen Khan in his regnal name, was the founder of the Yuan dynasty of China and the fifth khagan-emperor of the Mongol Empire from 1260 to 1294, though after the empire's division this was a nominal position.
Although Genghis Khan was more successful militarily, Kublai Khan's military was adequate. He was successful in completing Genghis Khan's conquest of China. Kublai Khan's military leadership style was very different from Genghis Khan's.
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