Lost Histories are the historical records associated with the Battle of Snow Plains, believed to have been hidden by Kitsu Yui, the ancestor of Kitsu Ayoko. Guilt over winning the battle through unfair means led Kitsu Yui to conceal these histories to correct the record. A scroll linked to this ancestor triggered a shared vision during its first opening.
During discussions, various characters shared experiences related to the battle, highlighting the importance of the Lost Histories. Kitsu Ayoko testified that her ancestor's fear and perceived dishonor contributed to the hiding of the records. The Scorpion clan, represented by Bayushi Monban, claimed to have preserved the Lost Histories for 300 years, arguing that they safeguarded rather than exploited these records. This assertion ignited debates about the moral implications of actions taken during the battle and the rightful ownership of the histories. Proceedings culminated in a séance where the spirits of Shishoru Amane and Okoma Akiyaku appeared, further linking the Lost Histories to discussions of honor, responsibility, and past events.