When Hideyoshi resigned from the post of Kanpaku in 1591, his nephew Toyotomi Hidetsugu assumed the position; he took up residence at Jurakudai with Hideyoshi's other nephew, Toyotomi Hidekatsu.
The passage describes the transfer of power from Hideyoshi to his nephew, Hidetsugu, after Hideyoshi resigned as Kanpaku in 1591.  Hidetsugu moved into Jurakudai with Hidekatsu, another of Hideyoshi's nephews.