Based on the "Demon Sealing Mark" and "Five Elements Ninjutsu," after having been through a hundred battles, earning military achievements, and receiving recommendations from the Ninja Leader, passing the Imperial Courtiers' exam, and being recognized by the Oda Clan, one could become a Jonin of the Demon Sealing Assembly and obtain the "Yin-Yang Unification Skill" granted by the Oda Clan, which were the secret ninjutsu developed by Takamanohara over the years, targeting "Ninjutsu" and "Magical Sprites."
However, following the defeat of Takamanohara, the Imperial Courtiers disbanded and at the request of the Safety Committee, ordered all Demon Sealing Ninjas to perform the "Ninja Seal," forbidding them from unsealing their marks.
This was partly to symbolize "laying down weapons to cease hostilities" and also out of concern that the "Demon Sealing Mark" and "Magical Sprites" might be captured by legions or other Celestial Companies.
