Devil_Hex
So that's why there are so many sharingan implants but no Byakugan implants aside from Ao. Fujin's analysis isn't far fetched. Cause if the seal was related to the Uzumaki clan then the Uchiha clan would also have it. Since Uchiha clan doesn't have this caged bird seal so that negates the possibility of this seal originating from them. Other villages would never help konoha village. So the probability of theseal originating from the Jashins is the most likely case.