1522: Date Tanemune Becomes Shugo of Mutsu and Nagayama Castle Falls - Sengoku Shogun Map
Date Tanemune was appointed shugo of Mutsu by the Muromachi shogunate, strengthening his political base in southern Ōshū around Yanagawa Castle. In Hitachi, the Shimasaki clan captured Nagayama Castle and expanded its influence in the Rokko region.
Major events
- 1522-月日不詳: Date Tanemune Is Appointed Shugo of Mutsu — Date Tanemune was appointed shugo of Mutsu by the Muromachi shogunate, increasing Yanagawa Castle's importance as the Date political center in southern Ōshū.
- 1522-月日不詳: The Shimasaki Clan Captures Nagayama Castle — The Shimasaki clan captured Nagayama Castle and expanded its influence in the Rokko region, an early turning point in its rise over neighboring lords.