Nah, to be more precise 'natural energy' runs through body.
'Senjutsu', as the name indicates is sen'jutsu', it is jutsu, jutsu can't run through body, natural energy can.You aren't getting what I am trying to explain here.
Let's bring some manga scan into this,
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Read uppermost panel of this scan, where Fukasaku states that 'techniques' which use chakra from three energy sources is 'senjutsu', i.e. techniques is a key word here.
Now how ninjutsu is different, let's go back a few panels.
Regular ninjutsu uses only internal energy and not energy from 'outside'.
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Minato's body isn't senjutsu, but rather his techniques are what we call 'senjutsu' or 'senpou art'. Regeneration function is restoring of once own stamina and spiritual energy, due to Edos being dead persons and hence they can be restored, due to them having particular balance of Yin-Yang(from my speculation large amount of Yin, as soul can't be killed, but let's not get deep into this) I don't know what senjutsu has to do with it.
Minato's body has natural energy flowing through it, doesn't mean that he can regenerate, since it isn't senjutsu but sage mode, natural energy and just like I explained before both of them are different.:yeah:
Having sage chakra passively affects body because your body gets more amount of energy which is external but it never gives your edo body regeneration abilities, especially against 'black stuff' through which only 'senjutsu' and not sage energy can breakthrough.
Yes it does passively and they aren't techniques at all, they are just 'enhancements', while to break through the black stuff you need 'techniques' or in other words senjutsus.
My point is further proven by the fact that Naruto himself used specific word 'senjutsu' when he attacked Obito successfully.
