Udaijin (Japanese右 大臣; historical Kun - readings Migi no Ohoimauchigimi, Migi no Otodo; German " Chancellor to the right " ) was a Japanese government official from the Nara and Heian period. It was written at the beginning of the 8th century as part of the secular administrative structure of the Daijō -kan in the Taiho Code.

The Udaijin as a state minister behind the Sadaijin ( " Registrar to the left "). He thus stood in third place in the Daijō -kan and was the de facto second-highest administrative position because the formal standing at the top Daijō daijin ( " Grand Chancellor ") was usually cast as honorary titles. By the end of the 12th century, the Udaijin lost as well as the entire Daijō -kan largely influence and was a ceremonial title at the court.

After the Meiji Restoration, the Daijō -kan in 1869 revived for a short time as a system of government before it was replaced in 1885 by the created to emulate western cabinet and finally abolished. The last Udaijin Iwakura Tomomi was.