Daiyu City was a city situated on the planet of Daiyu throughout the Imperial Era. In the year 9 BBY, the Inquisitorius' Third Sister formulated a scheme to draw Obi-Wan Kenobi, a Jedi Master, from his concealed location. This involved uncovering his connection to Senator Bail Organa. To execute this, the Third Sister instructed Vect Nokru and his associates to kidnap Organa's daughter, Leia. Consequently, Kenobi journeyed to Daiyu with the goal to rescue Leia.
The initial appearance of this city occurred in "Part II," which is the second episode of the television series Obi-Wan Kenobi.