【Summary】

1. 　Amaterasu-Ohmikami was a real shrine maiden born in the Hyugami Valley (Yabe, Yame City, Fukuoka Prefecture) around 100 BC, who enshrined the sun deity.
2. 　Iwarebiko, the sixth descendant of Amaterasu-Ohmikami, departed from Okanokuni (Onga District, Fukuoka Prefecture), invaded through Aki and Kibi, and reached the Kinai region around 50 BC, becoming the hero of the Eastern Expedition Myth.
3. 　Himiko was one of the Yametsuhime (signifying multiple generations of priestesses who existed throughout the ages to worship the sun god) welcomed from the Hyugami Valley to the Mount Jo-ou-yama of Yamataikoku the Yamato Province in Chikugo (Setaka, Miyama City, Fukuoka Prefecture) as the Queen of Wa Kingdom around 182 AD.
4. 　The Later Han dynasty knew from reports by its envoys that the distance from Lelang Commandery to Yamataikoku was approximately twelve thousand li, having previously measured the distance from Lelang Commandery to Matsurokoku as about ten thousand li. This indicates that Yamataikoku was located within the vicinity of present-day Fukuoka Prefecture. Though records from the Later Han period were lost, fragments survive as quoted passages in both the "Wei Lue," compiled by Yu Huan of Wei in 265 AD, and the "Wei Zhi Wajinden," compiled by Chen Shou of the Western Jin in 285 AD.
5. 　Hatsukuni-Shirasu was the first emperor to ascend the throne around 200 AD in Kibi Kingdom. He was revered as the incarnation of Iwarebiko, the hero of the eastern expedition myth dating back to around 50 BC. The emperors later referred to as the "Eight Generations of Lost History" (the second through ninth generations) actually existed within the Kibi Dynasty and remained in the memories of people migrating from Kibi to Makimuku after the year 280 AD.
6. 　The figures cited in the "Wei Zhi Account of the Wa people" (285 AD) describing Wa as a distant great nation ruled by Himiko wielding immense power—such as "20,000 households,""50,000 households,""70,000 households,""twenty days by water,""ten days by water and one month by land,""a thousand female attendants serving her," and "over a hundred human sacrifices" —are scientifically implausible as facts for that era. These decisive phrases not only sparked numerous fantasies in later generations but also possessed the immense power to topple the ancient Chinese dynasty of Wei. These phrases were absent from the original report by the Wei envoy and appeared only in the annotated version reported to the emperor by General Sima Zhao (211-265) after 260 AD. The "Annotated Version" itself is lost, but fragments of it survive as quoted passages within the "Wei Zhi Account of the Wa people."
7. 　The earliest archaeological site suggesting some form of royal authority existed in the Kinai region is the "Makimuku Site" associated with the tenth Emperor Sujin, the eleventh Emperor Suinin, and the twelfth Emperor Keikoh. Dating to after 280 AD according to Cambridge University's Carbon-14 Dating Calibration Curve "IntCal20," it is approximately 100 years younger than Himiko's era.
8. 　"Izanagi" and "Izanami" were named as the divine beings of Awaji and Awa during or after the Kofun period. They were designated as the Imperial Ancestors (the parents of Amaterasu-Ohmikami) in the texts of the 40th Emperor Tenmu (reigned 673-686), the "Teiki" and "Kuji" (no longer extant).
9. 　In 367 AD, the Yamato Royal Authority slew the last Yametsuhime in Yamato Province of Chikugo, leading to the fall of the Yamataikoku.
10. 　The historical texts of Emperor Temmu (reigned 673-686), the "Teiki" and "Kuji" (no longer extant), which are thought to have served as the basis for the "Kojiki" (Records of Ancient Matters 712 AD) and "Nihon-Shoki" (Chronicles of Japan 720 AD), were concealed (burned) by Fuhito Fujiwara (659-720).