Board Thread:Theories and Speculation/@comment-45444155-20200806213256/@comment-26636534-20200808225642

ReweR 1331 wrote: I mean, the senjutsu chakra is only created when the user mixes 50 units of physical energy, 50 units of spiritual energy, and 50 units of nature energy. If there's no perfect ratio, the chakra senjutsu won't work.

It won't work if there's less natural energy, No more natural energy - it won't work either, but you'll turn into a stone frog. We have been over this before, but let me say again what I said in other threads. Jugo bypasses the rule Fukasaku states, due to his body constantly absorbing natural energy. The manga also states that Jugo lacks control over his transformations, indicating a lack of balancing the required ratio's of physical/spiritual/natural energy.

Jugo obviously doesn't turn into a stone frog throughout the series, despite not being able to control his power, another indicator of bypassing the rule Fukasaku states. Thus, Jugo's senjutsu chakra does not lead to sage mode, but rather sage transformation.

It's also the reason why other cursed seal users are not sages. Therefore to conclude, senjutsu chakra =/= sage mode.