Ōgo

The Ōgo were a warrior house of Kōzuke, seated at Ōgo Castle below Mount Akagi. They claimed descent from Fujiwara no Hidesato through the Fujiwara-surnamed Ashikaga clan, and began when Ashikaga Shigetoshi, a son of Ashikaga Nariyuki, styled himself Ōgo Tarō.

The Heiji Monogatari records the family fighting in the Heiji Disturbance; they joined Minamoto no Yoritomo in 1180, and Ōgo Sanehide served in Minamoto no Noriyori's Kyushu campaign of 1185. They became Kamakura gokenin, and the heads Takayoshi and his son Sanehide were devout Pure Land followers who put questions to Hōnen by letter.

In 1350 the clan was defeated at Kasagake-no fighting for Ashikaga Takauji. The clan had backed the Kamakura side in the Genkō War; its main line was dispossessed and died out during the Nanboku-chō wars. The name appeared in a 1561 roll of Uesugi Kenshin's followers; Ōgo Shigeyuki's descendants took the surname Ushigome and became Tokugawa hatamoto after 1590.