Editing Aomori Prefecture (section)

===Muromachi period===
[[File:Horigoshi Castle moat.jpg|thumb|The remains of Horikoshi Castle]]
At the onset of the [[Ashikaga shogunate]], the Nanbu and Andō continued to rule the area, with the Nanbu controlling the current prefecture's southeastern section and the Andō controlling the [[Shimokita Peninsula|Shimokita]] and [[Tsugaru Peninsula|Tsugaru]] peninsulas. The Andō also were involved with controlling the fringes of Ezo, splitting their attention. In 1336, the Andō completed construction of [[Horikoshi Castle]] during the [[Northern and Southern Courts period]].<ref name="Tsugaru castle">{{cite web |year=2014 |title=津軽氏城跡 |trans-title=Tsugaru Castle ruins |url=http://www.city.hirosaki.aomori.jp/gaiyou/bunkazai/kuni/kuni29.html |access-date=1 July 2020 |work=Hirosaki City |language=ja}}</ref> During the Muromachi, the Nanbu slowly began edging the Andō out of present-day Aomori Prefecture. The Andō were pushed out of Tosaminato in 1432, retreating to Ezo, giving the Nanbu control over all their lands. The port settlement would fall into disrepair under the Nanbu.<ref name="Tosa"/>