Nonō Yakushi followed his gaze, realizing he was looking at the thick tomes stacked on the desk.
A quick glance revealed titles such as *Histology and Embryology*, *Illustrated Cell and Molecular Biology*, *Infectious Diseases*, *Systematic Anatomy*, and *Clinical Microbiology Handbook*...
Each book was as thick as a brick. Stacked together, they formed a mountain of books.
Medical ninjas not only needed extremely fine chakra control but also required extensive professional knowledge, an agile mind, and the perseverance to apply that knowledge flexibly.
It could be said that Medical Ninjutsu was the most academically demanding of all existing Ninjutsu.
"It's good that you can learn it." Nonō Yakushi looked up, a strand of blonde hair draped across her face, giving her the defined features of a mixed-race beauty.
It usually took ordinary medical ninjas months or even years to memorize these texts. If Kiyoshi wasn't lying, it showed his speed in memorizing things was very fast.
Such a promising talent was rare.
"Yes." Kiyoshi nodded.
*Very big*, he thought. *Probably too much for one hand to grasp.*
Out of respect for his teacher, Kiyoshi quickly shifted his gaze after only a quick glance from the corner of his eye.
His Dōjutsu power suddenly rippled.
Kiyoshi suppressed it.
He was the master of his Dōjutsu, not its slave.
"Are we going to follow the usual curriculum and memorize today?" Kiyoshi picked up a book.
The book in his hand was different from those circulated on the market.
It contained many annotations.
Scientific development in the ninja world was constantly evolving, and Medical Ninjutsu was no exception.
Since its systematic establishment, a new theory would be established periodically, and after another period, previous theories would be overturned and re-verified.
Nothing in the books was absolutely authoritative; the essence of science was continuous overturning and rebuilding.
Therefore, to properly learn Medical Ninjutsu, one had to stay at the cutting edge of the times and require an authoritative guide.
Otherwise, it would be tragic to spend years in seclusion memorizing all the knowledge, only to find out upon emerging that what was memorized was outdated, obsolete, and unusable.
"No, we have something else to do today." Nonō Yakushi set down her pen, stopping her writing on a case report.
"Follow me." Nonō Yakushi stood up and walked out of the office.
Kiyoshi followed Nonō Yakushi, who was wearing a white doctor's coat.
The two left the Hidden Leaf Hospital. Nonō Yakushi took him to another location frequently used for experiments.
The Hidden Leaf Hospital was, after all, a place for treating patients. The daily development of Medical Ninjutsu and experiments were conducted in a separate building, although it was very close to the hospital.
Nonō Yakushi led Kiyoshi into a larger room.
Kiyoshi looked up. Inside were many glass containers filled with light green solution, and the solution held various strange creatures.
"This is where experiments are conducted in the Hidden Leaf. There was a period when the village was obsessed with the First Hokage's Wood Release power and wanted to replicate it to gain dominance in the war." Nonō Yakushi introduced the situation to Kiyoshi.
The test subjects used were willing adults, but later, the experiments were called off because all of them tragically died, unable to withstand the Wood Release power, which was deemed too cruel.
This piece of history later became largely unknown.
Now that Kiyoshi was a medical ninja and her disciple, Nonō Yakushi intended to let Kiyoshi know more about the darkness of the ninja world, lest he be too naive and get sold out after she left, even helping the buyer count the money.
"So that's how it is." Kiyoshi nodded.
Although he already knew these things from the plot, he pretended to be hearing them for the first time.
He occasionally showed a look of astonishment.
His acting naturally couldn't deceive the top spy, Nonō Yakushi.
However, Kiyoshi was genuinely astonished by the various strange creatures inside, not the historical secret.
"Nonō-sensei, are these perhaps... Ninja Beasts?" Kiyoshi asked.
In the ninja world, there were all kinds of bizarre creatures. Most were huge, some could understand and speak human language, and they could even use Ninjutsu.
The most powerful Ninja Beasts had not only developed their own civilization but could also refine chakra and use the natural energy diffused throughout the environment to balance out Sage Mode chakra.
Three tribes were particularly prominent: the Snakes, the Slugs, and the Toads. The ninja world called their dwelling places the Three Great Holy Lands.
Once these Ninja Beasts signed a contract with a ninja, they could be summoned using the Summoning Technique, and these beasts were called Summoning Beasts.
"That's right. These are Ninja Beasts from the Summoning Island in the Land of the Sea." Nonō Yakushi nodded.
"There are also relics left behind by the Uzumaki clan. They made contact with the ninjas on the island and conducted experiments there to cultivate Ultimate Summoning Beasts. The island is home to many excellent life forms convenient for ninja summoning."
Nonō Yakushi recounted this history in detail.
The Uzumaki clan seemed to be extinct, with only Kushina Uzumaki remaining in the Hidden Leaf Village.
In reality, this was not the case; it was just that Kushina was the most valuable surviving Uzumaki. Her chakra was naturally vast, and she possessed a special effect that could suppress Tailed Beasts.
That was why she was the only Uzumaki clan member sent to the Hidden Leaf, immediately taken to Mito Uzumaki to undergo ideological education for becoming a Tailed Beast vessel.
The rest of the Uzumaki clan were scattered all over the world. Karin and Nagato were examples of this, one ending up in the Land of Grass and the other in the Land of Rain.
There were many more examples like this, but the Uzumaki clan had chosen to live under assumed names, just as Nagato's parents didn't tell him the history of the Uzumaki clan, wanting him to live as an ordinary person.
"So there was such a thing." Kiyoshi nodded.
This was actually a plot point in the original work, where Naruto's squad went to the Summoning Island, and there was a deceased Honoka Uzumaki.
The cause of her death was that the rampaging Ultimate Summoning Beast was completely unafraid of the Uzumaki clan's Adamantine Sealing Chains and killed her.
It seemed that this woman was still alive, and the research had just begun.
"The Summoning Beasts here are ones we bought from the Summoning Island for research and summoning." Nonō Yakushi continued to lead Kiyoshi deeper, to the central part of the facility.
"Little Kiyoshi, choose one you want, as a reward for becoming a Chunin." Nonō Yakushi smiled with motherly affection.
"But I haven't become a Chunin yet."
"Your teacher believes in you." Nonō Yakushi patted Kiyoshi on the shoulder.
She had read a parenting guide, which suggested that it was best to encourage children and build their confidence so they could go further in the future.
She just wasn't sure how much effect this would have on a child of Kiyoshi's age.
"Thank you, Nonō-sensei." Kiyoshi offered an appropriate smile.
His features were quite handsome, a fusion of Uchiha and Land of Lightning characteristics, giving him a sunny handsomeness.
***
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