Active Regeneration Technique and Hashirama's Abstract Notes

Could it be the Sage of Six Paths?

This person appears to be the first in the Ninja World to learn how to use Sage Mode.

To be precise, he was half a person, because he had half the blood of the Otsutsuki Clan.

As expected, the Sage Slug was referring to the Sage of Six Paths.

"Yes, Lord Meikyō is from the Uchiha Clan, and the source of the Sharingan of the Uchiha Clan is Indra, the eldest son of the Sage of Six Paths, who inherited a portion of the power of the Sage's Eyes. The ancestor of Lord Hashirama and Lady Tsunade was Asura, the second son of the Sage of Six Paths and the founder of the Senju Clan."

"I do know that. To this day, the Uchiha Clan still holds a commemoration on January 9th every year, the birthday of the Indra God. It is said that the Uchiha Gunbai was also made by Indra, representing the orthodoxy of the Uchiha Clan."

Meikyō responded from the Katsuyu's head.

The Katsuyu continued.

"A thousand years ago, there was no Chakra in this world. Including me, who was very young at the time, the mainstream of the world was the use of Natural Energy. Many animals gained long lifespans and great power by cultivating Natural Energy. Some of them lived alone, some accepted offerings from humans, and some were driven and used by humans. The last part was called shikigami, and the people who drove them were called onmyoji."

"Later, the Sage of Sage of Six Paths' mother Rabbit Goddess, planted the God Tree, which absorbed most of the Natural Energy of the planet to cultivate the Chakra Fruit, and then gave birth to the Sage of Sage of Six Paths and his younger brother."

"But as the God Tree absorbs more and more Natural Energy, the planet will become increasingly barren, eventually losing all life and becoming a withered, dead star."

"Therefore, Gamamaru of Mount Myōboku, who is now the Great Sage Toad, taught the Sage of Six Paths how to use Natural Energy. The Sage of Sage of Six Paths successfully learned Senjutsu Techniques and used the power of Senjutsu to defeat the Rabbit Goddess. In his later years, he divided the Ten-Tails, which was transformed from the God Tree, into the Nine Tailed Beasts that are now known."

As the Katsuyu spoke, it used Water Style to transform the water in the lake into various forms such as the Sage of Six Paths and the Ten-Tails, demonstrating its extremely high ability to Shape Transformation of Water Style forms.

"Later, the Sage of Six Paths founded the Ninshu, spreading Chakra throughout the world. He killed and sealed away those animals and strange demons that used Natural Energy to do evil and were called monsters by humans. Before his death, he handed the Ninshu over to his second son Asura."

"But Indra believed that he, as the elder brother, was more capable, having completed the test left by the Sage of Six Paths all by himself, while Asura had to rely on the help of others to complete it. He felt that he was more qualified to become the successor of the Ninshu."

"At first, Asura was no match for Indra, but on the advice of his friends, he decided to learn Senjutsu. With the help of people, he successfully made a contract with me and learned Senjutsu from me based on the experience left by the Sage of Six Paths. In the end, he led his supporters to continue fighting against Indra."

"This is the reason why the Senju Clan and Uchiha Clan fought for thousands of years, until it finally ended Lord Hashirama and Madara established Konoha."

The water on the lake surface quickly transformed from the forms of Indra and Asura Hashirama Senju and Uchiha Madara, before finally dissipating.

The Katsuyu continued.

"It is precisely because of the existence of the Sage of Six Paths and Asura that Mount Myōboku and Shikkotsu Forest have methods that allow humans to utilize Natural Energy."

"After that, people learned about the power of Senjutsu, and as a result, many people came to seek out those of us who had mastered Natural Energy before the establishment of the Ninshu. For example, the Enma Clan of the Water Curtain Cave can use Natural Energy to temper their physical bodies and possess an indestructible body, but they cannot teach humans Senjutsu."

"But not everyone is like the Sage of Six Paths or Asura. Most of these people who pursue power turn to stone, with only one exception."

Is it Ryūchi Cave- dong?

Meikyō raised her hand to answer.

This time, the little Katsuyu clone in front of the Meikyō nodded in response.

"Yes, the White Snake Sage of Ryūchi Cave is very wise. He extracts Natural Energy into his Venom and then injects it into people's bodies. Although many losers are still swallowed by the White Snake Sage, this method is actually much more reasonable than those who use unskilled methods that are not suitable for their race to absorb Natural Energy. Therefore, there have been cases in history where contractors from Ryūchi Cave have learned Sage Mode."

"It is precisely for this reason that Shikkotsu Forest, Mount Myōboku, and Ryūchi Cave, these three places with immortals who have cultivated for thousands of years, are known as the Three Great Sage Regions."

Meikyō stroked his chin, deep in thought.

Just as he guessed, the Sage Mode in the Naruto World is suitable for these animals to cultivate, which is why they exhibit mutations when using Sage Mode.

Even those with Perfect Sage Mode like Minato Namikaze and Naruto Uzumaki still end up with frog-like eyes.

"So, Senior Katsuyu, are you, the Toad Sage, and the White Snake Sage able to live for a thousand years also because of cultivating immortal techniques?"

Meikyō asked again.

"That's right. Ordinary Katsuyu don't live more than three years. Only by learning immortal techniques can one break through the lifespan limit."

The Katsuyu spoke, its two long, thin tentacles swaying.

Meikyō nodded silently.

If we could learn, or develop, a truly suitable immortal technique for humans, wouldn't it be possible for humans to break through the limits of lifespan?

"By the way, Lord Meikyō, now that you have mastered Sage Mode, you can now learn the secret Senjutsu of Shikkotsu Forest."

The Katsuyu's split body crawled in front of Meikyō and spat out a huge bundle of red scrolls.

Meikyō took it and spread it out.

Similar to the Frog Kumite and Frog Kata of Mount Myōboku, as well as the White Rage Technique and Inorganic Reincarnation Senjutsu Ryūchi Cave, Shikkotsu Forest also has its own Senjutsu developed based on the characteristics of Katsuyu.

"This Senjutsu technique is called the Active Regeneration Technique. It is a technique developed by imitating my healing and self-healing abilities. When using this technique, you use Senjutsu Chakra to stimulate a part of your body. This serves as a medium to change the proportion of cells in the body and achieve a large proliferation of cells in a short period of time, thereby achieving the effect of quickly healing wounds in a short time."

"Even Lord Hashirama, despite his body's naturally powerful self-healing abilities, stimulated his body's cells to produce more Chakra when using this technique, sacrificing a portion of his lifespan to unleash even greater power."

No wonder the First Hokage, a man with such a vibrant life force, died young!

Meikyō silently cursed in his heart and vowed never to use this Ninjutsu again unless he was in mortal danger.

Katsuyu can live for over a thousand years, and with their innate abilities, they can be manipulated without consequence, but humans are a different story.

Although she was inwardly complaining, Meikyō's body still honestly unfolded the scroll and began to read it.

If you're really in a life-threatening situation, this move can undoubtedly save your life.

It's better to lose a little life than to die on the spot.

"I see. It must be that Teacher Tsunade's Regenerative Healing Technique was created based on this principle. However, due to the difference between ordinary Chakra and Senjutsu Chakra, it is not only more difficult, but also far less effective than the Active Regeneration Technique."

After flipping through the scroll, Meikyō quickly grasped most of the essence of this Active Regeneration Technique.

The Regenerative Healing Technique, invented by Tsunade based on the Active Regeneration Technique, is the most difficult conventional Medical Ninjutsu the Hundred Healings Technique for Creation Rebirth. With Meikyō's current level of Medical Ninjutsu, he can actually do it.

For example, in the Suna battlefield, Meikyō, Yakushino Naiyu, Inuzuka Ryo, and Aburame Nami, under Tsunade's guidance, successfully used this Medical Ninjutsu to pull the severely injured Inuzuka Clan head Inuzuka Ōi, back from the brink of death.

After making sure that he had mastered every detail of the technique, Meikyō planned to return the scroll to the Katsuyu.

He had no intention of practicing or using a technique that would shorten his lifespan at this time.

"Eh? Lord Meikyō has already finished reading it so quickly? Actually, at the very end of the scroll, there are also some insights about Senjutsu written by Lord Hashirama. Lord Meikyō can take a look and learn from them."

Following the Katsuyu's advice, Meikyō looked at the very end of the scroll.

There were indeed a few lines of inconspicuous small print there.

"Hmm, Tobirama told me that such a powerful technique should be written down with some insights for Tsunade and other future generations to learn, and I think that makes a lot of sense!"

However, I haven't studied Senjutsu for very long, so I don't seem to have any insights or understanding. So I might as well write down some of my feelings when using Senjutsu to provide a reference for future generations. Also, if Tsunade also learns Senjutsu, Grandpa hopes that you will never have to use this last one.

In short, when I want to enter Sage Mode, I basically just clap my hands to form a hand seal, extract my Chakra, and mix it with the Natural Energy I sense. If I were to add any details, it would be standing there and straining my whole body. Using the Active Regeneration Technique would also involve straining my entire body even more, giving me a feeling that my internal organs are also working hard. ——————— Hashirama Senju

Ah, this...

One can only say that he truly lives Hashirama Senju.

This was the first time Meikyō had ever seen such a general understanding of Ninjutsu.

This Naruto, is the kind of player who isn't very good at pure theory, but has extremely high talent and physical instincts in actual combat and training.

This kind of person is very good at teaching, but not so good at teaching others.

Just like when Naruto teaches Konohamaru the Rasengan and Shadow Clone, you first "bang" and then "thud" to pop the ball to make the Rasengan. To learn Rasengan Shadow Clone, you just need to "squeeze" it once to create Shadow Clone.

The fact that Konohamaru was able to learn these two Ninjutsu under Naruto's abstract teaching, and even later teach them to Boruto, can only mean that he is a genius among geniuses.

Hashirama's level of abstraction is no less than Naruto's.

Use all your strength.

He strained his whole body even harder.

"How was it, Lord Meikyō?"

Hearing the Katsuyu's expectant voice, Meikyō could only reply:

"Um... the First Hokage's notes... are indeed extraordinary, completely different from any cultivation notes I've ever seen before!"

"Really? That's wonderful!"

Several dark lines appeared on Meikyō's forehead.

After returning from Shikkotsu Forest, Meikyō went to find Orochimaru.

Orochimaru set up a temporary underground laboratory a dozen kilometers away from the camp to conduct his initial research on demon blood, as well as some research on the Living Corpse Reincarnation and the First Hokage's Cells.

In the dry basement, under the dim light, Orochimaru gently shook the reagent in his hand and poured it into a test tube in front of him.

"Meikyō -jun? I remember you went to Shikkotsu Forest to learn Senjutsu, didn't you? How come you're back so soon?"

Hearing Meikyō's footsteps, Orochimaru put the test tube back on the shelf and turned to look at Meikyō.

"It's okay if you haven't learned Senjutsu Mode, because neither your teacher Tsunade nor I have been able to learn it. Only Jiraiya, and there's also Minato Namikaze, who seems to have mastered Sage Mode to a level close to that of the First Hokage."

Orochimaru believed that whether one could learn Senjutsu depended entirely on the individual. No matter how talented one was, if one did not have the aptitude to learn Senjutsu, then one simply did not have the aptitude to learn it.

Uchiha Meikyō returned so quickly, probably because he, like me, found it difficult to master the basics and thus returned hastily.

"But it's alright if you don't know Senjutsu. With your strength, Meikyō -kun, you are undoubtedly at the pinnacle of the Ninja World. Whether you have Senjutsu or not, you are the strongest individual in the Ninja World right now. Besides, you also have the Oni and the First Hokage's Cells, which can point the way for our future development. Perhaps, we can learn Senjutsu in the future by studying Natural Energy."

Orochimaru picked up a handkerchief, wiped his hands, and then casually gestured for Meikyō to proceed.

"No, Senior Orochimaru, Sage Mode is not difficult for me."

Following Orochimaru's movements, Meikyō sat down in the chair, clapped his hands, and then exerted all his strength as Hashirama Senju had instructed!

Then, the surrounding Natural Energy quickly gathered around Meikyō and was absorbed by her, merging into her Chakra to form Senjutsu Chakra.

The immortal face of the Shikkotsu Forest also appeared on Meikyō's face.

Orochimaru paused, a hint of displeasure on his face.

"What does Meikyō- jun mean by this? Is he here to show off that he has learned Senjutsu that I was unable to learn?"

"That's not the case."

Meikyō took a scroll that she had prepared before setting off from behind her back and pushed it on the table to Orochimaru.

"This is..."

"Breathing Technique, Serpent Breathing."

Orochimaru unfolded the scroll, glanced at it, and his gaze was immediately fixed on its contents.