Uŭijŏng
Uŭijŏng, also known as the Right State Councilor, was the Third State Councillor of the Uijeongbu during the Joseon period of Korea. The Uŭijŏng was variously referred to as Usang, Ujŏngsŭng, Ugyu, Uhap, or Udae.
Uŭijŏng was the lowest of the three prime ministers, ranked senior first, roughly equal to the Second Deputy Prime Minister in modern day.
The position was created in 1400 by Taejong, replacing the former position Munha Usijung during Goryeo period. Its name was changed to Uŭijŏngbusa in 1418, then to Ŭijŏngbu Uŭijŏng in 1455.
During the Joseon dynasty, Uŭijŏng was also granted posthumously as an honorable position to fathers-in-law of Grand Internal Princes, Grand Princes, or Crown Princes' sons.
The position was abolished in 1894.