i thought it was borrowed power...isnt SM an advanced mode of what everyone has? i see chakra as energy, which is gained by eating, breathing fresh air, daily exercise and so on. but SM opens more of the bodies absorption of energy/chakra through other methods focusing mainly on breathing and mental ability/will power. wouldn't that mean that it is borrowed power. but like with people like Madara who were born with a strong chakra, it just means that the energy/chakra that his body accumulates would be more concentrated the the average ninja? idk, but if uchiha fans (or any fan for that matter) thinks that only one ninjutsu move is borrowed and the others are not, then thats just stupid.... in conclusion, im on the side that says all ninjutsu is borrowed power...even looking at the history of ninjutsu, if it weren't for the eating of the trees fruit, and the playing around with the powers he was born with, Hagoromo, wouldn't have made ninshu which was basically the ability to use the energy/chakra in other ways.