The Plain of Fast Troubles (FF) or Plains of Otosan Uchi were the plains surrounding Otosan Uchi. Its name came from the law that once said that it was illegal to move armed men across the plain, and any approaching army soon find the whole of the Empire moving against them. That law was issued by Hantei Yugozohime, shortly after she wrestled control of the Empire from the clutches of the Gozoku. The law was dead following the Fall of Otosan Uchi. These lands had been technically the Seppun family's domain.