Emperor Nintoku was the 16th emperor of Japan, traditionally believed to have reigned from 313 to 399 AD. He is known for his long and peaceful reign, which is often associated with the prosperity of the Kofun period. Nintoku is also remembered for his efforts in promoting agriculture and infrastructure, including the construction of burial mounds. Nintoku's tomb, known as the Daisen Kofun, is one of the largest burial mounds in Japan and is located in Osaka Prefecture. His legacy includes a focus on the welfare of his people, and he is often depicted as a benevolent ruler who prioritized harmony and stability in his realm.