Before Hagoromo appeared, it was believed that he created Ninjutsu, but this recent chapter denies it. So the bottom-line is who created Ninjutsu?
I believed that the other person who created Ninjutsu was no other than his brother.
Why?
Because they both received the same power through birth (maybe), and the Juubi was sealed into both of them.
Conclusion:
Hagoromo is the Sage of Six Paths that created Ninshuu.
His brother, the other Sage of Six Paths created Ninjutsu.
Discussed
I believed that the other person who created Ninjutsu was no other than his brother.
Why?
Because they both received the same power through birth (maybe), and the Juubi was sealed into both of them.
Conclusion:
Hagoromo is the Sage of Six Paths that created Ninshuu.
His brother, the other Sage of Six Paths created Ninjutsu.
Discussed