On top of that, in the future, Uzumaki Naruto had already developed Ultimate Weapons like the Big Ball Rasengan and Wind Release: Rasenshuriken. They had long since surpassed the scope of A-Rank Ninjutsu and were fully at the S-Rank level.
It was embarrassing to say, but as his father, Minato still had to learn Ninjutsu from his own son. Recently, he had been studying an Ultimate Weapon like the Wind Release: Rasenshuriken.
Unfortunately, there was not much he could do. That move was not very practical for him. It was not that he could not learn it. He simply had a weakness Uzumaki Naruto did not have. His Chakra reserves were too small.
For a Kage Level expert, his Chakra reserves were definitely not low. But compared with Uzumaki Naruto, they were far behind. Uzumaki Naruto's normal Chakra reserves were at least more than ten times greater than an ordinary Kage Level shinobi's. That was not only because the Uzumaki Clan naturally possessed enormous amounts of Chakra, but also because Naruto was the reincarnation of Otsutsuki Asura's Chakra.
So Uzumaki Naruto's Chakra reserves were already absurdly vast by nature. It was similar to the special case of the previous generation's Asura, Senju Hashirama. They were different from ordinary Uzumaki Clan members or Senju Clan members.
The Wind Release: Rasenshuriken's power was indeed astonishing, and its range could be expanded or compressed.
But it consumed far too much Chakra. With his own Chakra, he could not sustain it more than a few times. That was not even mentioning the fact that he would need to master Sage Mode or Nine-Tails Chakra Mode before he could use it properly.
So in the end, everything returned to the fundamental problem. His most reasonable path was actually to copy his future son's path and master both Nine-Tails Chakra Mode and Sage Mode at the same time.
What had Kaede Kitahara called it?
Oh, Sage Tailed Beast Mode!
As long as he had Sage Tailed Beast Mode, could he also reach Super Kage Level without relying on eyes?
If so, he would be qualified to participate in the battle to protect the Shinobi World.
At the very least, he could not let his son keep fighting alone in the future. But this was something he needed to discuss with his girlfriend.
With that, he put down the diary. A slightly ingratiating smile appeared on his face as he walked toward the door and called out, "Kushina, there's something I want to talk to you about."
"Otsutsuki Toneri can still be saved. He isn't completely beyond hope. He's actually the same as Nagato. Neither of them was properly taught, that's all."
Jiraiya sighed. He glanced at the diary and felt that Toneri was very similar to Nagato. Both had gone down the wrong path because they had never been guided properly, but their true natures were not evil. There was still a chance to save them.
They were completely different from someone like Orochimaru.
Orochimaru had not gone wrong because of a warped understanding. He had already walked completely onto an inhuman path. It was entirely different.
But Jiraiya could not help with this matter. He could not take part in battles at that level. Still, he could record all of this and leave it for Naruto. If this happened again in the future, Naruto would not know nothing.
He might even be able to solve the problem in advance.
"The Tenseigan, or a large number of Byakugan, can absorb a person's Chakra unless that person is a descendant of Hamura?" Uchiha Itachi drew a question mark after that point.
Because he did not know whether Hyuga Hinata had not feared having her Chakra absorbed because she herself was a descendant of Hamura, or because she had Otsutsuki Hamura's own Chakra inside her, as she had said.
Or perhaps either condition was enough?
In any case, it definitely was not because Hyuga Hinata was strong enough.
"An ordinary Byakugan definitely doesn't have that kind of ability. Then is this the ability of the Byakugan's second stage or third stage? Or is it the Tenseigan's ability?"
Uchiha Itachi pondered silently. It did not feel like the Tenseigan's ability, because Otsutsuki Toneri had not displayed that ability while he possessed the Tenseigan. Then it might be an ability possessed by those countless gathered Byakugan.
Only someone who was also a descendant of Otsutsuki Hamura might avoid having their Chakra absorbed. This absorption ability might even be passive, allowing it to absorb energy from the sun.
It was just that Toneri's own physical strength clearly could not withstand it. That was why it backfired later. If Uzumaki Naruto had not saved him, he probably would have been finished for real.
So Uchiha Itachi leaned toward the idea that this ability did not belong to Otsutsuki Toneri himself, nor was it the Tenseigan's ability. It came from those Byakugan.
He had noticed in the video that every pair of Byakugan carried a will behind it. The wills of the Branch House members had even influenced Otsutsuki Toneri in the end, causing him to completely lose control.
Adding to that, there had also been Otsutsuki Hamura's Chakra inside the moon. Or was it his soul?
He did not know how Otsutsuki Hamura's so-called dying wish had been passed down, nor how it had turned into a command for Otsutsuki Hamura's descendants to destroy the mistaken Shinobi World created by the Sage of Six Paths.
Judging by the way Otsutsuki Toneri had wept bitterly later, he must have learned the truth. But how could he have believed such a truth?
Was Otsutsuki Hamura truly still alive?
Or at the very least, did he exist in the form of a soul? If that was true, it was terrifying.
"Karma. There is also the existence of Karma. According to Kaede Kitahara, the Otsutsuki Clan all possess an ability called Karma. Through Karma, they can be reborn generation after generation and continue living. That means that as a legitimate member of the Otsutsuki Clan, Otsutsuki Hamura must also possess this ability. His so-called dying wish must be false."
Uchiha Itachi frowned.
"Then if it was false, why didn't Otsutsuki Hamura stop it? And why did the population of the Otsutsuki Branch Family keep shrinking? What secret is hidden in all of this?"
Uchiha Itachi could not understand it. He could not make sense of it at all.
Based on his original estimate, the Otsutsuki Main Family had first sent Otsutsuki Isshiki and Otsutsuki Kaguya Hime to the God Tree to carry out some kind of mission. But that mission required sacrificing Otsutsuki Kaguya Hime. Clearly, as the lower-ranked member, Otsutsuki Kaguya Hime had not been willing to accept that, so she rebelled and launched a surprise attack on Otsutsuki Isshiki.
Not everyone was like Otsutsuki Kinshiki, who had no mind of his own and only obeyed orders.
Otsutsuki Hagoromo and Otsutsuki Hamura were most likely later sent by the Otsutsuki Main Family to hunt down Otsutsuki Kaguya Hime, who had failed to complete her mission and had rebelled. But then came the question. After Otsutsuki Hagoromo and Otsutsuki Hamura completed their mission, they seemed to have chosen the same path as Otsutsuki Kaguya Hime.
They also rebelled against the Otsutsuki Main Family. They did not choose to return to the Otsutsuki Main Family. Instead, they took root in the Shinobi World, creating the earthly Shinobi World and the lunar Shinobi World. Otsutsuki Hagoromo even became the Sage of Six Paths, spreading the seeds of Ninjutsu and Chakra throughout the Shinobi World.
According to legend, the Sage of Six Paths was already dead. Originally, Itachi had believed that completely.
But now, of all things, he knew about the Otsutsuki Clan's unique Karma. So he dared to conclude that Otsutsuki Hagoromo and Otsutsuki Hamura were not dead.
In fact, they were both alive and well.