I will use the ninja world to aid my cultivation of immortality.

First, let's talk about ninjutsu.

Lightning Release, being his primary ninjutsu honed over more than a decade, was naturally his main focus, and he even planned to develop his own unique style for it.

There are no other plans for dedicated development.

He was merely preparing to study Earth Escape Technique as a supplementary skill.

The purpose of practicing earth-遁 (earth-遁 is a technique or method of escape) is to enhance one's defensive capabilities.

In addition, one should study illusion and physical skills as supplementary subjects.

Illusion magic goes without saying.

In terms of physical skills, this is the foundation of combat power.

Even ninjas who specialize in ninjutsu cannot completely abandon taijutsu, otherwise they would be unable to engage in high-intensity combat.

Discoveries Recorded in Chapter 17

"Super Strength Technique, huh? I've been craving this taijutsu for a long time, but I had to give it up because it requires such high levels of chakra control. Now I can finally give it a try!"

The various records kept for several consecutive days did not make Naraku feel much tired; on the contrary, he maintained a lot of energy and enthusiasm.

At this moment, Naraku, who had already entered the stage of recording physical techniques, suddenly had a bright look in his eyes when he recorded one of the physical techniques.

This physical technique is the "Super Strength Technique" passed down by the Senju clan.

"Super Strength Technique" is an extremely special physical technique.

Unlike conventional taijutsu, which focuses on the use of physical techniques, the skill of "Super Strength Technique" lies in the control of chakra.

By precisely controlling chakra and then concentrating and unleashing it, an astonishing, overwhelming force can be generated.

This is how the "superhuman strength" is used.

Of course, it sounds simple, but it's actually very difficult to do.

For example, within the root organization that has this lineage, no one has ever mastered this physical technique.

This is naturally not because no one in the Root organization wanted to learn this martial art.

Nobody knows how, they just haven't been able to learn it.

With Tsunade as a typical example.

Before Naraku awakened his memories of his past life, he also considered learning the "super strength technique," but like everyone else, he ultimately failed.

But now.

As his comprehension improved, his control over chakra also improved by leaps and bounds, naturally boosting his confidence.

He plans to start with "Super Strength" in terms of physical skills.

After recording the "Super Strength Technique," Naraku continued with his work.

Before he knew it, both illusion and physical techniques had been successfully overcome, and next, Naraku arrived at the area of ​​secret techniques.

The collection of secret techniques is also quite extensive.

There are secret techniques like "Super Beast Imitation Painting" that were stolen from the outside world, and there are also secret techniques like "Beast Mimicry Ninjutsu" that came from the Konoha ninja clan.

Naraku took out a secret technique from the nearest bookshelf. The name marked on the scroll was the "Shadow Technique" of the Nara clan, one of the ninja clans of Konoha.

"This secret technique seems to be missing a part."

When Naraku was recording, he wasn't just recording mindlessly; he was also thinking things through while recording.

As Naraku was recording the "Shadow Technique" in his hand, he suddenly frowned, realizing there was a problem.

The improvement in his comprehension made Naraku's thinking more acute.

He had read the "Shadow Techniques" before, after all, secret techniques are superior to ordinary ninjutsu in many aspects.

However, the difficulty of mastering secret techniques is often higher than that of ordinary ninjutsu, so Naraku gave up after trying and failing.

Similarly, he didn't find any problems during the trial.

However, at this moment, with his greatly increased comprehension, Naraku keenly realized that there was a problem with this secret technique.

To be precise, it's not that the 'Shadow Technique' itself is the problem, but rather that the 'Shadow Technique' recorded in the scroll he currently possesses is the problem.

After a moment's thought, Naraku did not immediately draw a conclusion. Instead, after recording the information, he picked up the next secret technique.

This time it was still a secret technique of the Konoha ninja clan, and it just so happened to be the "Mind Transfer Technique" of another member of the Ino-Shika-Cho trio, the Yamanaka clan.

"This secret technique has the same problem!"

After reading it, Naraku gave his evaluation and then continued to browse through other secret techniques.

One by one, the secret techniques were read and recorded.

Because secret techniques are even rarer.

Even though it was more complex than ordinary ninjutsu, Naraku only took one day to record all the secret techniques.

After recording these secrets, Naraku rubbed his temples, feeling somewhat helpless.

"These ninja clans really put thought into offering their secret techniques!" Naraku thought to himself.

Since Danzo has made his secret techniques public, there's no way he could be keeping anything to himself.

Therefore, the only way a secret technique could have problems is if it comes from the person who provides it.

After observing all the secret techniques, Naraku discovered a phenomenon.

That is, the secret techniques outside the village are all recorded in very complete form.

Conversely, secret techniques originating from within the village are more or less problematic.

These issues are very subtle.

It's not that it's completely impossible for people to learn, but rather that it greatly increases the difficulty of cultivation.

Simply put, it's like a jigsaw puzzle where a core part is missing, so you have to fill in the gaps to complete the puzzle.

Combining the information from the outside world about the secret techniques, Naraku easily completed the deduction.

Those were the ninja clans of Konoha. Although they contributed their clan's secret techniques as a sign of submission when they joined Konoha, some of the core techniques they offered were retained.

Naraku was surprised by this action, but not entirely unexpected.

For ninja clans that do not inherit bloodline limits, secret techniques are the foundation of their existence.

Even if the village has an agreement not to leak the secret techniques, the ninja clans certainly won't completely trust them.

Therefore, it is perfectly normal to keep some things to oneself, and it is only human nature.

"Well, it's already good enough that we've obtained most of the information about these secret techniques. Further research will just take a little more time."

Although the incompleteness of the secret technique left Naraku somewhat frustrated, he quickly adjusted his mindset.

Since it's all free anyway, getting even a small portion is a win.

Moreover, he planned to leave Konoha in the future, and the thought that the secret techniques carefully passed down by the Konoha ninja clans would become the foundation for his future power made Naraku even happier.

Feeling better, Naraku stretched and yawned. As his body cracked and sprang, he glanced at the surrounding bookshelves and finally looked in a certain direction toward the database.

After passing the rows of bookshelves blocking his way, Naraku's gaze fell upon a tightly closed iron door.

Meanwhile, a member of the Root organization stood guard on each side of the iron gate.

"Now only the spells in the Book of Sealing haven't been recorded yet." Naraku quickly withdrew his gaze and strode towards the database exit.

The Book of Sealing is the most crucial part of all the techniques passed down in Konoha.

However, within the root organization, there are still rubbings placed by Danzo.

However, unlike other techniques, even though Danzo had great faith in the control of the "Seal of the Extinction of the Tongue," he still imposed certain restrictions on the inheritance of the Book of Seals.

To learn the spells in the Book of Seals, one must become a full member.

Moreover, learning is not completely open; students can only choose one option.

If you want to learn more, you can only continue to improve your status, such as becoming a captain, or even becoming Danzo's right-hand man.

The techniques of the Book of Sealing are naturally very tempting.

But Naraku has no intention of ending his comfortable training environment.

Therefore, he can only consider the techniques in the Book of Sealing later.

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Chapter 18 Assessment

After finishing recording the inheritance of various techniques, Naraku did not become idle.

After working on the database for more than ten days, the assessment date for the root organization was also fast approaching.

The lights illuminated the base of the Roots organization, ensuring it remained bright even underground.

At this moment, in the central square of the base, ten boys and girls dressed in combat uniforms stood in a row.

Meanwhile, on the walls surrounding the square and along the corridors, stood members of the Minggen organization.