The location of ancient Yamatai-koku and its relation with the subsequent Kofun-era Yamato polity remains uncertain. In 1989, archeologists discovered a giant Yayoi-era complex at the Yoshinogari site in Saga Prefecture, which was thought to be a possible candidate for the location of Yamatai. While some scholars, most notably Seijo University historian Takehiko Yoshida, interpret Yoshinogari as evidence for the Kyūshū Theory, many others support the Kinki Theory based on Yoshinogari clay vessels and the early development of Kofun (Saeki 2006).