According to the earliest official accounts, the eighth-century Kojiki ( Record of Ancient Matters ) and Nihon-shoki ( Chronicles of Japan ), the islands of Japan were born of a marriage between the god Izanagi and his sister Izanami.
Izanagi was a naive fool for marrying his sister.
mnli hypothesis: Izanagi was a naive fool for marrying his sister. premise: According to the earliest official accounts, the eighth-century Kojiki ( Record of Ancient Matters ) and Nihon-shoki ( Chronicles of Japan ), the islands of Japan were born of a marriage between the god Izanagi and his sister Izanami.