Since recovering his memories, Minato had systematically organized all available intelligence and assessed his current situation.
Out of fear that it might disrupt the timeline, he decided not to tell the Third Hokage or Master Jiraiya about his rebirth. After all, even before regaining his memories, his simple act of intervening on Kushina's behalf had already changed many fates.
This included his love story with Kushina, which had started several years earlier than it originally would have.
Kushina herself had also become significantly stronger than her original self. Minato had not only taught her the Shadow Clone Technique but also shared various related skills with her.
He made every training decision carefully after serious thought.
Of course, he intended to master the Flying Thunder God Technique—but not yet. At his current level of speed, he wouldn't be able to fully utilize its power.
The Rasengan was still incomplete in development but was already quite powerful. At this point, he didn't particularly lack offensive strength or burst capabilities.
With just a single kunai, various ninjutsu techniques, and his speed, he was confident he could defeat any opponent below jonin level.
A ninja's strength isn't solely determined by how many techniques they know or how powerful those techniques are. Without the matching basic physical abilities, one is nothing more than superficially strong.
Minato fully understood this. Furthermore, both his speed and overall quality had reached a bottleneck—only through persistent training over time could they naturally improve.
He absolutely didn't want to make the mistake of pulling up seedlings to help them grow faster.
Right now, his top priority was confirming everything he had discovered within himself. For that reason, he needed to once again enter the deeper spiritual realm to meet with the Nine-Tails.
There were two methods. The first was using the Nine-Tails sealed inside Kushina, just like last time—establishing chakra resonance.
However, under current circumstances, this approach was impractical.
That left only the second option: intensifying his study of the Uzumaki clan's sealing techniques.
Although he now possessed all his past memories, allowing him to learn previously studied jutsu much faster,
the Uzumaki Sealing Techniques weren't easily mastered. Yet if successfully learned, they would significantly boost his combat capability.
In the Ninja World, many regarded sealing techniques as fringe arts, believing them practically ineffective in battle.
That was absolutely a prejudice.
Only those who had truly encountered powerful sealing techniques would understand how terrifying such techniques could be.
Techniques capable of conjuring prison-like barrier seals from nothingness, Chakra Seals, and more...
Ever since the Uzumaki clan's destruction, ninja employing Uzumaki Sealing Techniques had almost completely disappeared. Even Minato himself, despite possessing knowledge of Uzumaki sealing arts, rarely used them during battles.
Because...almost all the ninja who had ever seen the Yellow Flash in action were long gone.
Before Minato's death, the only surviving ninja who had fought against him were the Raikage siblings from the Land of Lightning and the Masked Man who had controlled the Nine-Tails to attack Konoha.
As for other ninja villages across the great nations, none possessed many sealing techniques. Compared to the Uzumaki clan's sealing arts, theirs were like Hotaru's glow challenging the radiance of the moon—utterly incomparable.
To once again meet the Nine-Tails deep inside his spiritual realm and figure out just how useful—or dangerous—its chakra really was to himself, Minato threw himself completely into nonstop training.
Thus... half a month passed quietly.
Throughout those fifteen days, Minato hardly ever left his room, only stepping out now and then to grab food and basic supplies.
Although he had promised Jiraiya-sensei that he would train moderately, for Minato—who now carried those memories—the time remaining was limited.
Moreover, due to the Nine-Tails' chakra, his physical condition differed from ordinary people; his recovery ability and stamina were extraordinarily impressive.
As he grew older, this trait became even more pronounced.
Inside Minato's room, two copies of himself stood face to face.
One "Minato" performed hand seals and then slammed his hands onto the other Minato.
Immediately, black chakra markings spread across his body, and the chakra within Minato began gradually calming down.
[Puff!]
The Minato who had cast the Chakra Seal instantly disappeared—it was a Shadow Clone.
Minato immediately closed his eyes, relying on his understanding of sealing techniques to calm his mind and attempt to enter the deeper spiritual realm within.
However, about half a minute later, he opened his eyes again.
Because he sensed that every last bit of sealed chakra in his body had already restored completely.
This was the technique Minato developed over those days. After spending half a month mastering several carefully selected sealing techniques, he'd found this approach.
First, he used a Shadow Clone to seal his own chakra, enabling him to truly focus and explore deeper into his sealed body's spiritual space.
However, even without resistance, the clone could only suppress his chakra for about thirty seconds at most.
If he exerted force, it couldn't last even a few seconds.
Yet this was already an extremely abnormal effect. In battle, if a ninja's chakra were sealed off for even a few seconds, their defeat was practically decided.
Minato wasn't fazed—it was only the first try, after all.
He made the cross hand seal, created another Shadow Clone, and resumed the practice.
Then, failure again...
So Minato fell into a cycle.
After three attempts, Minato realized that the clones he produced were no longer sufficient to suppress his real body's chakra.
Therefore, he temporarily stopped and began refining his chakra.
About four hours later, when night had grown deep, Minato resumed his training once more.
His recovery ability was extraordinary—he could restore spent chakra in half the time it took a normal ninja.
Thus, repeating endlessly.
Day one... Day two... Day three...
Minato never stopped — tirelessly searching, depleting his chakra, and recovering again and again.
The leave he had requested from the Third was already mostly gone, and the time he had arranged to look after Kushina would soon come to an end as well.
She must have been going through a hard time during this period.
Though she appeared carefree on the surface, she was actually a very delicate girl who cared deeply about others' opinions of her.
Becoming the Nine-Tails Jinchūriki meant loneliness, and before the Great Ninja World War began, Minato wanted to help her completely overcome that isolation.
He would not allow her to suffer even the slightest harm — be it from villagers or external threats.
No matter how fierce the storm, he was her shield against it all.
Day Five.
When Minato initiated the sealing process once again, he swiftly entered that focused, distraction-free state. By now, after several days of practice, he was quite familiar with the process.
Finally, this time he didn't immediately exit that state afterward.
His consciousness sank deeper, as if dissolving into a hazy void.
A cold, chilling sensation appeared in his awareness.
"I did it!"
Joy stirred in Minato's heart. That feeling could only mean one thing — the Nine-Tails!
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