
Built the largest kofun tomb in the world, Daisen Kofun.
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Emperor Nintoku's reign is traditionally dated from 313 to 399 AD and is considered a period of stability and prosperity for the Yamato state. He is credited with expanding agricultural infrastructure and consolidating the imperial line's authority.
Emperor Nintoku is said to have ordered the construction of irrigation canals and rice paddies to boost agricultural output. These projects are recorded in the Nihon Shoki as having alleviated famine and strengthened the economic base of the Yamato court.
Emperor Nintoku commissioned the construction of the Daisen Kofun in Sakai, Osaka, the largest keyhole-shaped burial mound in the world. The tomb measures 486 meters in length and is surrounded by three moats, reflecting the immense power and resources of the Yamato state.
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