Naruto's training ground for senjutsu was near a waterfall.
This was no ordinary waterfall. What poured down was not water, but toad oil.
Toad oil was not only highly flammable and could be used in conjunction with Fire Release, but also automatically attracted natural energy. It was an excellent aid for cultivating Sage Mode. Unfortunately, once it left the environment of Mount Myōboku, it would vaporize if not used immediately. Otherwise, Sage Mode would probably be everywhere.
"Well then, Pervy Sage, Boss Hayato, Sage Fukasaku and I are going to train."
After saying goodbye, Naruto headed with Sage Fukasaku toward an area filled with sharp protrusions.
Jiraiya watched Naruto's retreating figure, feeling both proud and sentimental. "Who would've thought Naruto's Sage Mode training would go so smoothly? It far exceeded expectations. Sigh, looks like this father-and-son pair of disciples is about to surpass me. That's a little embarrassing..."
Yet he laughed proudly as he spoke. He did not look embarrassed at all.
"Which stage has he reached?" Hayato asked.
"Frog Kata."
"So he's completely succeeded already."
The prerequisite for using Frog Kata was successfully mastering Sage Mode. However, Frog Kata was far from the only application of Sage Mode.
In truth, Sage Mode was more like a buff that fully activated the body's cells, enhanced perception, and improved chakra quality. As long as senjutsu chakra was used, all taijutsu and ninjutsu would be enhanced.
It was simply that, due to the special nature of senjutsu chakra, it could not be casually applied to other ninjutsu. It required practice and adaptation.
"By the way, what did the Great Toad Sage tell you?" Jiraiya asked. "Forget it if you can't say."
After thinking for a moment, Hayato scratched his head. "It's not that I can't say it. I just don't know how