Kenichi Amamiya yawned. It would not be easy to correct the problems plaguing the ninjas. After all, their development had reached this point by following the paths laid out before them. Although, after Kenichi Amamiya had spoken with Kaguya Ōtsutsuki, the ninjas had begun cultivating according to the methods of the Otsutsuki Clan, there had not been much improvement so far. Most ninjas remained in a relatively normal state. Kenichi Amamiya pondered the matter. Solving these problems would be somewhat troublesome, but it was not impossible. There was still a chance to resolve them; it would simply take more effort. Thinking of this, Kenichi Amamiya scratched his head. The nation currently had people specifically in charge of the technology department, and naturally there was someone responsible for the ninja side as well. So Kenichi Amamiya went straight to the ninja department, intending to ask for their thoughts. The person he sought out this time was also an old acquaintance: the Second Hokage, Tobirama Senju. This man was quite capable, and Tobirama Senju was also very strong. More importantly, he was highly skilled at inventing ninjutsu. Many of Konoha's forbidden techniques had come from Tobirama Senju's hand. Thus, based on Tobirama Senju's abilities, Teng Shu felt there was some hope. As long as Tobirama Senju could properly develop the things they needed, he would be able to demonstrate his corresponding capabilities, and the ninjas could grow stronger as well. Originally, however, Teng Shu had intended to give this position to Madara Uchiha. Madara Uchiha was also a powerful ninja, and his research into ninjutsu was not weak either. But Madara Uchiha refused to do it. He insisted on spending every day drinking with Hashirama Senju, so Tobirama had been chosen instead.
When Kenichi Amamiya found Tobirama Senju, the man was signing