In Setaka, there was a shoen (a manor in medieval Japan) of the TOKUDAIJI family, a branch of SANJO Family (the Hose of Fujiwara North, Kan'in Line), and Yasumune was in charge of managing the shoen as a shokan (an officer entrusted with local management by the lord of the private estate).
瀬高には、藤原氏藤原北家閑院流の三条家から分かれた徳大寺家の荘園があり、宇都宮泰宗は荘官としてその管理とも関わっていた。