century. Focus was given on who should be the "true" ancestors of those who occupied the throne. Gosashi kofun While the actual site of Jingū's grave is not known, this regent is traditionally venerated at a kofun-type Imperial tomb in Nara. This Kofun is also known as the "Gosashi tomb", and is managed by the Imperial Household Agency. The tomb was restricted from archaeology studies in 1976 as the tomb dates back to the founding of a central Japanese state under imperial rule. The Imperial Household Agency had also cited "tranquility and dignity" concerns in their decision making. Serious ethics concerns had been raised in 2000 after a massive archaeological hoax was exposed. Things changed in 2008 when Japan allowed limited access to Jingū's kofun to foreign archaeologists who were able to determine that the tomb likely dated to the 4th century AD. The examination also discovered haniwa terracotta figures. Empress Jingū is also enshrined at Sumiyoshi-taisha in Osaka, which was established in the 11th year of her reign (211 AD). Controversy Birth of Ōjin and Jingū's Identity According to the Kiki, Empress Jingū gave birth to a baby boy whom she named Homutawake (aka Emperor Ōjin) following her return from Korean conquest. The legend alleges that her son was conceived but unborn when Emperor Chūai died. As three more years would pass before Homutawake was finally born, this claim appears to be mythical and symbolic rather than real. Scholar William George Aston has suggested that this claim was misinterpreted, and instead refers to a period of less than nine months containing three "years" (some seasons), e.g. three harvests. If Ōjin was an actual historical figure then historians have proposed that he ruled later than attested years of 270 to 310 AD. Jingū's identity has since been questioned by medieval and modern scholars whom have put forward different theories. Kitabatake Chikafusa (1293–1354) and Arai Hakuseki (1657–1725) asserted that she was actually the shaman-queen Himiko. The kiki does not include any mentions of Queen Himiko, and the circumstances under which these books were written is a matter of unending debate. Even if such a person was known to the authors of the Kojiki and Nihon Shoki, they may have intentionally decided not to include her. However, they do include imperial-family shamans identified with her which include Jingū. Modern scholars such as Naitō Torajirō have stated that Jingū was actually Yamatohime-no-mikoto and