The Snow Plains field records consist of a complete history of the Battle of the Snow Plains, recorded by historian Akoto Akihito. These records were discovered sealed in a jar within a hidden cache, revealed to Akihito through a vivid dream. They are unedited and bear the historian's chop and seal, confirming their authenticity.
Additionally, a draft of an unsigned and unratified agreement between the Unicorn and Scorpion clans regarding the diamond mines was found, along with a sealed letter addressed to "the least of the Bayushi" and a skeleton buried in a shallow grave at the site.
Shiba Midori presented the Snow Plains field records as evidence at the Castle of the Swift Sword, emphasizing their relevance to an investigation. Katsuki Kage, the presiding magistrate, accepted the records for authentication by Lion experts. The records provide critical insights into the battle's events. The draft agreement notably favors the Shosuro family, contrasting with a previously submitted treaty by Bayushi Monban. The court recognized the significance of these records in assessing claims related to the diamond mines and the historical context of the Battle of the Snow Plains.