Legendary narrative In the Kojiki and Nihon Shoki, only his name and genealogy were recorded. The Japanese have traditionally accepted this sovereign's historical existence, and an Imperial misasagi(陵) or tomb for Kōshō is currently maintained; however, no extant contemporary records have been discovered that confirm a view that this historical figure actually reigned. Kōshō is believed to be the oldest son of Emperor Itoku, and his wife Amanotoyototsu-hime. His mother was the daughter of Okishimimi-no-kami. The Kojiki records that he ruled from the palace of at Waki-no-kami in what would come to be known as Yamato Province. Kōshō allegedly had a wife named Yosotarashi-hime, and fathered two children with her. His reign lasted from 475 BC until his death in 393 BC, his second son then took the throne and would later be referred to as Emperor Kōan.
LegeNdaRy Narrative iN the kOjikI and niHON ShokI, Only hIs NamE aND geNEAloGy werE recoRDed. the Japanese hAVe tRadItiOnAlly acCEpTed tHis sOverEign's HiStOriCal Existence, and an IMperial MisAsagi(陵) Or tOmB fOr kŌshŌ iS cUrrently mAInTained; hoWEver, no EXtanT conteMpoRarY rEcords have Been discovered thaT conFIrm A vIew that this historical FIgure aCtuaLLy rEignED. kŌShŌ is BeliEVed to bE the oLDEst soN oF EMperoR Itoku, aNd His wIfe amanOToyotoTsU-hIMe. his MoTHEr was The daUghter of OkIShiMimI-No-kamI. the kOJiki recORds ThaT he ruleD fRoM tHe palace of at wakI-no-kAmi in WHaT wOuld coMe tO Be knoWn As yamato prOvInce. KŌshō allEGedLy haD a WifE naMEd yosotaraShi-HimE, And FatHEreD TWo chilDrEn wITH Her. hIs ReIgN lAstED froM 475 bc unTiL His death in 393 bc, HIs sEConD soN theN tOok The tHronE and wOuLd Later be reFerred to as EMPerOr kōan.