The Kanto Plains are a significant geographical feature in the realm, known for their strategic importance in military engagements, particularly during the Battle of Kanto Plains. This region is characterized by expansive, open fields that facilitate cavalry maneuvers and infantry formations. The climate is variable, influenced by nearby mountains and rivers, resulting in a landscape that can be lush or challenging depending on the season. The plains are dotted with minor castles, with the Castle of the Swift Sword serving as a prominent stronghold strategically located to oversee the lands.
The Castle of the Swift Sword features two conjoined fortresses with guest dormitories and extensive libraries, indicating its dual role as both a military and educational center. The castle has been a focal point for military activities, including discussions regarding the ongoing conflict in the Kanto Plains and the recent battle outcomes. Notable figures involved in these events include General Akodo Family Sakura and Akodo Akihito. The castle also facilitates preparations for further actions, including the dispatch of letters and provision of care for wounded members, while serving as a backdrop for important diplomatic and strategic conversations.