Ninja God In Comics Chapter 115

Strong physical fitness, huge chakra, and tenacious mental will...

These are the three key points of practice that were highlighted in the practice notes of the Wet Bone Forest Immortal Mode by a senior Immortal who does not wish to reveal his name.

For ordinary ninjas, these three prerequisites may be a little difficult to achieve.

But for Jasper, these three prerequisites are basically non-existent.

With Hashirama's sage body, the One-Tail's chakra, and his indomitable will, the Sage Mode of Shimonoseki seems to be tailor-made for him.