Naruto: I wrote in my diary that I exposed the Otsutsuki's arrival.

Chapter 16 Kakashi: Feasibility Analysis Report on Countering Tsukuyomi

The scene shifts, the Tsukuyomi genjutsu ends, and Kakashi Hatake finally returns to reality from that terrifying and boundless hell. In an instant, he is panting heavily, as if he has gone through endless torment, and then collapses on the water's surface.

"What's wrong, Kakashi? Can't you open your eyes yet?"

Hearing the commotion, Kurenai quickly asked.

Kakashi Hatake, panting, said, "No, not yet."

Sarutobi Asuma also realized something was wrong and said, "What happened? He just finished speaking and you collapsed."

Kakashi Hatake, barely managing to remain kneeling, thought to himself, "Three days in that world is just a fleeting moment in reality?"

"But why doesn't he eliminate me? If he wanted to, it wouldn't be difficult at all."

Suddenly, more and more questions were swirling in Kakashi Hatake's mind.

"Oh? You actually survived that attack without suffering a mental breakdown. But speaking of which, Itachi-san, isn't overusing those eyes a risk for you?"

Kisame Hoshigaki asked.

Meanwhile, Itachi Uchiha's face was twitching slightly, seemingly confirming Kisame Hoshigaki's statement.

Kakashi Hatake, who was off-screen, had already taken out paper and pen and started taking notes.

Tsukuyomi!

Is it a limited eye technique of Itachi Uchiha's Mangekyou Sharingan? Or is it an eye technique that all Mangekyou Sharingan possess?

The illusion reconstructs space, time, mass, and pain within the genjutsu space. Even an elite Jonin like myself, who is proficient in genjutsu and how to dispel it, cannot resist it. If we take into account the Sharingan's inherent strong resistance to genjutsu, then this genjutsu can affect those it targets, possibly even surpassing elite Jonin. Even Kage-level figures would find it difficult to escape its grasp.

It has surpassed the strength of any genjutsu I currently know. I don't know if it's because the level of Tsukuyomi itself is high enough, or if it's directly related to the Mangekyou Sharingan's amplification of genjutsu.

Or perhaps a combination of both.

Kakashi Hatake wrote down his doubts on paper, because for a ninja, information is the most important thing.

There are no invincible ninjutsu, only invincible people. Now that I have obtained important information about Itachi Uchiha, I won't be so foolish as to stare directly at Itachi when I encounter him in the future.

Being tortured for three days and three nights like this, even if one's mind doesn't break down, would probably be severely damaged, and such injuries are difficult to treat with ordinary medical methods.

However, he also had the same question as his future self: judging from the strength of the Tsukuyomi genjutsu, it should have been able to kill him very easily, but Uchiha Itachi did not.

Was it because of his past relationship with his former boss that he let him off the hook?

This is because it has reached Itachi Uchiha's limit. Judging from Kisame Hoshigaki's words, people who are hit by this ninjutsu usually suffer a mental breakdown. However, this ninjutsu is just a genjutsu, and it has its limits. In other words, if one has extremely strong mental strength and composure, one can still endure it and may not necessarily suffer a mental breakdown.

However, Kakashi Hatake quickly jotted down a guess on a piece of paper.

This Tsukuyomi is a torturous experience for the person being slept with for seventy-two hours, but it's probably not easy for the sleight of hand either. You can tell from the fact that after the sleight of hand, Itachi Uchiha tried to keep his composure, but couldn't help twitching his face.

Therefore, it seems that Tsukuyomi's range of effects is very narrow, and it may only affect one or a few people.

Secondly, while Tsukuyomi is incredibly powerful, the price to pay is also significant, including the risk of overusing the Sharingan.

This is something others may not understand, but Kakashi Hatake understands it very well because he often overuses his Sharingan.

For someone like him, who is not from the Uchiha clan, using the Sharingan for even a short period of time would lead to overuse of the Sharingan, resulting in complete exhaustion and requiring a long period of rest.

Uchiha Itachi was a member of the Uchiha clan and also possessed the Mangekyou Sharingan, but he had already entered an overload state after only using Tsukuyomi once?

Based on the power demonstrated by Tsukuyomi, it shouldn't be that powerful. Or perhaps Itachi Uchiha's body has some kind of problem that prevents him from sustaining such a drain on his energy?

Or perhaps the Mangekyou Sharingan itself places a heavy burden on the body?

Moreover, from the very beginning, the two of them were casually leaking information during their conversation, such as their purpose for returning to Konoha, information about the Mangekyou Sharingan, and the overload that would result from using the Mangekyou Sharingan.

This information should be extremely important to ninjas, but the other party revealed it as if they didn't care at all.

He didn't believe the other party was completely unaware, after all, both of them were originally among the best ninjas in their respective villages.

If even they don't understand something as simple as keeping confidential information from being leaked, then there are very few people in the world who do.

For a moment, countless question marks flashed through Kakashi Hatake's mind. He scribbled on the paper, but couldn't find the answers, so he continued reading.

"Are you looking for Sasuke?" Kakashi Hatake asked in the video.

Itachi Uchiha calmed his expression and said, "No, it's the legacy of the Fourth Hokage!"

Both Sarutobi Asuma and Yuhi Kurenai were shocked upon hearing this.

As one of the few elite Jonin in the village and an important member of the Jonin team, they knew what the Fourth Hokage's legacy was: Naruto Uzumaki.

Or perhaps the Nine-Tailed Fox within Naruto Uzumaki.

"Is that Naruto?" Kakashi Hatake asked.

Meanwhile, Sasuke Uchiha, who was off-screen, was filled with doubt. He was different from Kakashi Hatake.

Kakashi Hatake always knew Naruto Uzumaki's identity, that he was the child of his teacher and his teacher's wife, and that the Nine-Tailed Fox was sealed inside his body.

Sasuke Uchiha had no idea. He hadn't joined Team 7 yet, and hadn't formed any bond with Naruto. To him, Naruto was just a annoying kid who caused trouble all day and never went to school.

The problem is that this annoying person keeps causing trouble for me all the time, and seems to really dislike me.

However, he had seen many hot-blooded idiots like this before, and he didn't think Naruto Uzumaki was anything special.

If there's anything special about this, it's that this hot-blooded idiot was actually assigned to the elite class and ended up in the same class as all the elites.

The legacy of the fourth generation?

What exactly is that thing?