Her son became the fifteenth emperor and is known by the canonical name of Ōjin. He commenced his reign in the year A.D. 270, and reigned forty years and died at the age of one hundred and ten. But the beginning of his reign is reckoned in the government list from the death of his father. The Emperor Ōjin is widely worshipped as Hachiman the god of war, although he is by no means noted as a warrior. The explanation of this curious circumstance is found in the fact that his mother was pregnant with him during her famous invasion of Korea, and her heroism and success are attributed to the martial character of her unborn son. The good fruits of the Korean conquest particularly showed themselves in A.D. 284, when the king of Kudara sent his usual tribute to the emperor of Japan. The ambassador for that year was Ajiki, a learned man who was familiar with Chinese literature. At the request of the emperor he gave the young prince, who afterwards became the Emperor Nintoku, lessons in the Chinese language and literature. The year following the king of Kudara seeing how much his efforts to furnish Chinese learning were appreciated, sent an eminent Chinese scholar, Wani, who took with him the _Confucian Analects_ and the _Thousand Character Essay_, two noted Chinese classics and presented them to the emperor. The prince continued his studies under Wani and became a very learned man. The emperor had three sons between whom he wished to divide his authority, wishing however to establish his youngest son as the crown prince and his successor. He summoned them before him and put this question to the elder, “Which should be preferred, a younger son or an older?” Then the elder son replied that he thought the older son should be preferred. But the emperor turned to the second son and asked him the same question. He replied that as the older son was more grown and less of a care, he thought the younger son would be more of a favorite. The emperor was pleased with this reply because it coincided with his own sentiment. He created his youngest son, Prince Waka-iratsu, the crown prince and ordered his second son, Prince Osasagi, to assist him. He gave the charge of the mountains, rivers, forests, fields, etc. to his eldest son.