Chapter 104: Given Chakra Output X and Chakra Mass Y, Find the Maximum Power of the Ninjutsu
"It really was the Nine Tails…" Hashirama's emotions were complicated.
He genuinely had not expected that after his death, a future Fourth Hokage would end up dying because of the Nine Tails.
The Nine Tails was the strongest of the tailed beasts. In Kenichi's mind, with someone like Hashirama around, it should have been manageable. Yet somehow, it had still become a threat to later Hokage. He could not wrap his head around how a Hokage could fall to it.
Thankfully, Hashirama did not dwell on that point for long.
"Even though I mastered Wood Release, it is impossible to use it to ripen crops," Hashirama said, waving a hand. He understood what Kenichi was aiming for, but Wood Release simply could not do that.
"If it could, I would have been out ripening rice every day back then," Hashirama added. "Konoha would not have needed to rely on the surplus food from the Senju and Uchiha clans when the village was first established."
Kenichi's lips twitched. He had expected that answer, but he still felt uneasy if he did not test it directly.
"Then, Lord Hokage," Kenichi said, smoothly shifting targets, "how did you create Wood Release?"
His eyes flicked with curiosity. If Wood Release could not accelerate crop growth directly, then maybe he could learn the underlying principle and develop a jutsu specifically meant to speed up plant growth.
"That is all I know." Hashirama shrugged.
Kenichi took a slow breath. As expected. For Hashirama, Wood Release was as natural as breathing. There was no step by step method to explain.
Orochimaru smiled faintly.
He had heard the old man say it before. The First Hokage was an unusual person. In a polite description, he had the heart of a child.
In less polite terms, according to Hiruzen, Hashirama was overwhelmingly powerful, yet his personality could be so carefree it made people laugh and cry at the same time.
Now Orochimaru was seeing it with his own eyes.
Kenichi still refused to give up.
"First Hokage, could you come with me for a moment and demonstrate your Wood Release jutsu?" he asked.
It was rare to have an opportunity like this. Kenichi would feel restless if he did not study it while he could.
Impure World Reincarnation itself had little research value. There was no way to figure out how it connected the living world and the Pure Land. All they knew was that it used a power that dragged a soul back, and that it required a signpost.
Those so called signposts were the body tissues of the reanimated person. With that tissue, it was easy to pull a specific soul, instead of randomly grabbing an unknown one.
"Alright." Hashirama agreed readily, and Kenichi followed him out.
They entered the forest.
Hashirama immediately demonstrated several Wood Release jutsu he had mastered, but he avoided anything too grand, like Wood Release: Advent of a World of Trees. That would cause far too much commotion.
This was the Land of Rice Fields. Small countries did not truly have much autonomy. Many of the Land of Rice Fields' missions were routed through Konoha's mission system.
If Konoha ninjas discovered traces of Wood Release here, it would become a huge problem.
After all, Konoha's founding was directly tied to Hashirama, and Wood Release was practically deified within the village.
Kenichi recorded everything with pen and paper while several shadow clones worked alongside him. A few of those clones even made requests that sounded strange enough to make Hashirama blink.
"Lord Hokage," one clone said politely, "could you use the chakra equivalent of Fire Release: Great Fireball Jutsu and cast Wood Release with that output?"
Fortunately, that was not difficult for Hashirama. Still, he looked a little puzzled by the request.
Kenichi's main body smiled as he accepted the data the clone reported and wrote it down.
Using the chakra cost of a single Great Fireball Jutsu, Hashirama's Wood Release could grow a tree three meters tall, thick enough for one person to hug. The effect was far more visually striking than the fireball itself.
"What is the use of this?" Hashirama asked, scratching his head. "I fight with ninjutsu. When I am dead, I am dead. Why ask so many questions?"
"Hokage, if we calculate the relationship between chakra output and ninjutsu power, we can find the optimal output," Kenichi explained. "That way, we can maximize power while minimizing chakra consumption."
He knew results would differ from person to person, but this was a rare chance. That was exactly why he wanted to test it now.
Take Fire Release: Great Fireball Jutsu as an example. Sasuke's early fireball and Sasuke's later fireball were not the same thing. Same jutsu, completely different power.
Even so, Kenichi wanted Hashirama's data.
If they ever became enemies in the future, having records would be useful. Better to be prepared.
And more importantly, Kenichi wanted baseline data. He wanted to eventually derive an accurate formula, like buoyancy. Plug numbers in, get answers out.
So could ninjutsu be classified through a formula?
If chakra output was defined as X and chakra mass as Y, then perhaps ninjutsu power followed a linear distribution. If so, finding an optimal solution might reveal the best chakra output, the point where power peaked for the lowest cost.
If that were possible, it would be a revolution.
But those questions could not be answered with a single dataset. It would take enormous data, countless reports, and a great deal of work to reach even a somewhat reliable conclusion. After that, it would still require extensive testing to verify.
That could be done later.
Right now, Kenichi was simply collecting sample data from the First Hokage for analysis in the future. Once the sample size was large enough, that would be the time to start serious summarization and verification.
"Thank you for your trouble, Hokage sama," Kenichi said with a chuckle as he released Impure World Reincarnation.
Hashirama had been worked so hard that he was out of chakra.
Of course, if it were Hashirama's original living body, his reserves would have been terrifying. But this was Edo Tensei. The chakra available was limited.
Kenichi turned to his shadow clones. "Put all of this data into a special file box."
It seemed he would need another approach if he wanted to study this further. For now, he could leave continued collection to the shadow clones.
He still had thermobaric weapons to research.
This was foreshadowing for future work, nothing more. It did not mean he was abandoning thermobaric bombs to chase theory. He would not do research in a messy, careless way.
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