As the name of the clan "Imu" means "to abstain from
Kegare", or "Saibai", the Imu clan was responsible for the rituals of the ancient Imperial Court, as well as for making ritual implements and building palaces. In the narrow sense, it refers to the Inbe family, the central family that led the Inbe clan, but in the broad sense, it includes the clans of the tribesmen who were led by the Inbe clan. The main Inbe family claimed its ancestor was
Amatatama-no-mikoto, who appeared in the
Amano-Iwato myth of the Chronicles. It was based in the area around the present-day town of Inbe in
Kashihara, Nara. They led the various clans in the region, and together with the
Nakatomi clan, administered rituals for the Imperial Court since ancient times. In the
Shukushi of the
Enki-Shiki, it is written, "Let the Saibe clan's shukushi be used for the rituals of the palace and the gates, and let the Nakatomi clan's shukushi be used for all other rituals." However, starting around the
Nara period, the Nakatomi clan grew in power, and overwhelmed the Inbe position. In the early
Heian period, the clan changed its name from Inbe to Saibe, and Saibe Hironari wrote the book
Kogo Shūi. However, it never regained its momentum, and the position of ritual clan was occupied by the Nakatomi and Ohnakatomi clans. The Inbe were divided into two groups: the Tomobe (public officials belonging to the imperial court) and the Kakibe (private citizens of the Inbe). Unlike the Saibes of the central clans, who had fewer and fewer achievements, the Inbe of the various regions included Izumo, who delivered jade, Kii, who delivered wood, Awa, who delivered cotton and linen, and
Sanuki, who delivered shields. It is known from the literature that the people of these tribes later took the name of Inbe. These local clans left their traces everywhere. == Origins ==