二天一流
Iwami Toshio, one of the three "daijuichi" successors, disputes the sole representation of Hyōhō Niten Ichi-ryū, not recognizing the two other seito lines. His group alleges that Imai Massayuke changed his mind about having three successors after the decision of Kiyonaga Fumiya to follow without further contact with him and Iwami Toshio.