In either case (fictional or not), the name Sujin-tennō was assigned to him posthumously by later generations. His name might have been regularized centuries after the lifetime ascribed to Sujin, possibly during the time in which legends about the origins of the imperial dynasty were compiled as the chronicles known today as the . Sujin's longevity was also written down by later compilers, who may have unrealistically extended his age to fill in time gaps. While the actual site of Sujin's grave is not known, the Emperor is traditionally venerated at the Andonyama kofun in Tenri, Nara. The Imperial Household Agency designates this location as the kofun (tumulus), and its formal name is ''Yamanobe no michi no Magari no oka no e no misasagi. Sujin's kofun is one of six that are present in the area; the mounds are thought to have built sometime between 250 and 350 AD.
In either case (fictional or not) the name Sujin-tennō was assigned to him posthumousl,y by later generations. His name might have been regularized centuries after the lifetime ascribed to Sujin, possibly during the time in which legends about the origins of the imperial dynasty were compiled as the chronicles known today as the . Sujin's longevity was also written down by later compilers, who may have unrealistically extended his age to fill in time gaps. While the actual site of Sujin's grave is not known, the Emperor is traditionally venerated at the Andonyama kofun in Tenri, Nara. The Imperial Household Agency designates this location as the kofun (tumulus), and its formal name is ''Yamanobe no michi no Magari no oka no e no misasagi. Sujin's kofun is one of six that are present in the area; the mounds are thought to have built sometime between 250 and 350 AD.