Sadaijin

was a government position in Japan in the late Nara and Heian periods.Nussbaum, Louis-Frédéric. (2005). "Daijin" in Japan Encyclopedia, p. 139.

History
The position was established in the Taihō Code of 702. The official acted in the context of a Council of State (daijō-kan) which was made up of the three men.Hall, John Whitney et al. (1993).  The Cambridge History of Japan, pp. 232-233. 
 the Chancellor or Prime Minister (daijō-daijin)
 the Minister of the Left 
 the Minister of the Right (udaijin).

The Taihō Code system was replaced in the Meiji period.

Related pages
 Imperial Household Agency

References

Category:History of Japan
Category:702 establishments in Japan