Kogo Shūi (古語拾遺) is a historical record of the Inbe clan of Japan written in the early Heian period (794–1185).
[1][2] Historically, both the Inbe and Nakatomi clans had long performed Shinto religious services for the Japanese imperial court.
The historical events described within the Kogo Shūi are nearly identical with those found in Kojiki and Nihon Shoki, the oldest written histories of Japan.
However, there are several events unique to the text[specify], so the Kogo Shūi serves as a valuable source of early Japanese history not found in the national histories.
[1][2] Linguistically, the text contains a large number of old words written in man'yōgana which make it a valuable resource for studying Old Japanese.