The Japanese have traditionally accepted this royal's historical existence, and a mausoleum (misasagi) for Iitoyo is currently maintained. The following information available is taken from the
pseudo-historical Kojiki and
Nihon Shoki, which are collectively known as or
Japanese chronicles. These chronicles include legends and myths, as well as potential historical facts that have since been
exaggerated and/or distorted over time. Princess Iitoyo was born sometime in 440 AD and is also referred to as . While both chronicles agree that Iitoyo descended from
Emperor Richū, the exact degree of this relationship is told differently. According to the
Kojiki, Iitoyo was born to and was the younger sister of the imperial prince
Ichinobe no Oshiwa. Alternatively, the
Nihon Shoki states that Iitoyo was the daughter of Ichinobe no Oshiwa and his wife , which would make her a sister of Woke and Oke and a grandchild of Emperor Richū. Both of the chronicles (
Kiki) are in agreement that after the death of the 20th
Emperor Ankō (r. 453–456), his brother murdered all rivals who could claim the throne and then ruled as the 21st
Emperor Yūryaku (r. 456 – 479). Notably, his victims included his cousin Prince
Ichinobe no Oshiwa, who was the eldest son and crown prince of Emperor Richū. Oshiwa's sons Woke and Ōke fled to the countryside after his murder and sought refuge under the care of a
muraji. She then appears to have taken over as regent until the governor of
Harima province sent a message to the capital that he had found Princes Woke and Ōke. Iitoyo then gave the order to bring her nephews to her in the palace, where after some debate Ōke ceded the throne to Woke, who became
Emperor Kenzō. Alternatively, the
Nihon Shoki states that two grandsons of Emperor Richū were eventually found and adopted by Emperor Seinei. Sometime in 482 AD, Prince Oke was appointed as Crown Prince while Woke was made a Royal Prince. Princess Iitoyo's death in 485 AD and burial place is only recorded in the
Nihon Shoki. In this continuing narrative Prince Ōke ceded the "Empire" to Prince Woke who finally accepted the throne as Emperor Kenzō. Iitoyo was allegedly buried in a (
misasagi) on Mount Haniguchi in Katsuraki. ==Historical assessment==