Konoha: Starting with Sage Mode

The leak of Nine-Tails' chakra could not be hidden from the ninjas responsible for defense outside. As soon as Kirito successfully suppressed Nine-Tails again, a group of Jonin and some sealing team ninjas that Kirito knew, who were proficient in sealing techniques, quickly arrived one after another.

Some of the first people to arrive even witnessed Kirito using the sealing technique, Adamantine Lock, to suppress the Nine-Tails back into place.

"It's all over now, go back. We don't need you here for the time being."

At this moment, Momoka exercised her authority as the Hokage's advisor and gave orders to the ninjas who had rushed over.

"Ha, if you need anything, please let us know immediately. We'll be waiting outside."

The leader, a Jonin from the Sarutobi clan, immediately responded and then led the others away.

However, some of the sealing squad ninjas stayed behind, and they were taking out some sealing scrolls to seal the Nine-Tails chakra that had not disappeared for a long time in the room.

Kirito was doing the same thing. He was much faster than the sealing team ninjas. He used the sealing technique, Adamantine Lock, modified chakra chains to quickly pull the Nine-Tails chakra, which should have been invisible, to his side.

Finally, Kirito collected the large amount of Nine-Tails chakra scattered in the room into a bottle filled with numerous sealing techniques, and then put it into an empty summoning card.

Seeing this, the sealing squad ninjas in the room all stared longingly at the chakra chains released from Kirito's body.

They were discerning and knew the power of these chakra chains.

Without a doubt, this is an offensive sealing technique. It not only has the effect of binding chakra, but can also be used to extract chakra from people, thereby disrupting the enemy's chakra and preventing them from releasing ninjutsu normally.

Sealing Technique: Adamantine Lockdown!

The name came to mind on the same occasion.

This powerful sealing technique, unique to the Uzumaki clan, has been studied by their sealing class, who also possess related learning scrolls. However, over the years, no one has been seen to have mastered it.

However, the chains formed by the Vajra Seal in their minds should be golden, completely different from the chakra chains released by Kirito at this moment.

Clearly, this is a new version of the sealing technique, Adamantine Sealing Barrier, which Kirito improved upon.

Kirito, like them, is not a member of the Uzumaki clan, which means that they also have the opportunity to learn this improved sealing technique, Adamantine Sealing Technique.

As expected of Lord Mito's prized disciple, the most outstanding sealing technique genius since the founding of Konoha, he has even successfully improved such a powerful sealing technique.

"Kirito, is the sealing technique you're using right now the Adamantine Sealing Technique?"

Soon, an older member of the sealing squad shamelessly asked Kirito a question.

"That's right, it's an improved version, and you can learn it without needing the bloodline of the Uzumaki clan."

Since Kirito had used this improved sealing technique, he had anticipated this scene and calmly said.

"Then could you..."

Upon hearing Kirito's affirmative answer, the older sealing squad ninja immediately wanted to reveal their true purpose.

But before he could finish speaking, Kirito interrupted him, saying, "No problem. I will reveal this sealing technique later. You can all learn it, but there are two conditions: first, you cannot teach it to others without my permission; I must place the sealing technique on you; second, you must fully participate in the upcoming Nine-Tails inheritance."

"no problem."

The older sealing squad ninja agreed without hesitation.

Kirito's conditions are not strict at all; in fact, they are quite lenient.

The first condition is self-evident. This improved Adamantine Lock was originally unique to Kirito, and it's already very commendable that he's willing to contribute it. It's impossible for it to be made into a side story.

The second condition is also acceptable. These people were originally ordered by the Third Hokage to carry out the Nine-Tails' inheritance and were already prepared to face the Nine-Tails directly.

In short, Kirito practically gave them a precious sealing technique for free.

As the older sealing squad ninja agreed, the other sealing squad ninjas also happily agreed as well.

"Okay, I'd like to thank you on behalf of my teacher."

Kirito was grateful to see that all the sealing team ninjas present had agreed to his conditions.

This expression of gratitude was heartfelt.

Only those who have faced the Nine-Tails directly truly understand how powerful it is. Once the Nine-Tails breaks free from its seal, the ninjas who participated in sealing it will become its primary target, facing immense threats and certain death if they are not careful.

Kirito felt it was worthwhile to give them this improved version of the Adamantine Sealing Chains, since they had come at such great risk. If they could learn it, it would at least increase the safety of sealing the Nine-Tails.

There's strength in numbers.

The original storyline did not explain in detail how Kushina successfully became the Nine-Tails Jinchuriki, but after personally experiencing the power of the Nine-Tails, it is likely that the process was not easy to complete, and Konoha must have paid a considerable price to successfully seal the Nine-Tails again.

This can be understood by simply thinking about the Nine-Tails' rampage in the original storyline.

Although Konoha is not as weak as it was after the Third Shinobi World War, sealing the Nine-Tails will definitely not be easy.

Moreover, Mito is currently in a very weak state, so it's uncertain how much of a role she can play in sealing the Nine-Tails.

Therefore, he needs more people to learn the Adamantine Sealing Technique, which can effectively trap the Nine-Tails.

Without further ado, Kirito took out a summoning card from his person, used the Summoning Jutsu: Release Jutsu to take out a scroll from it, and then summoned the sealing team over, beginning to teach them the improved version of the Adamantine Sealing Technique step by step.

The sealing team ninjas here are all elites in the sealing team. They have a solid foundation in sealing techniques, and with just a little guidance from Kirito, their learning speed improves rapidly.

Suddenly, Nawaki ran over, interrupting Kirito's lesson. He said to Kirito, "Kirito, Grandma is awake. She wants you to come over."

Upon hearing Nawaki's words, Kirito immediately stopped teaching and hurried towards Mito.

"I'm here, teacher."

Kirito held Mito's hand in both of his and whispered.

"Kirito, you did a great job. You completed the final task. You'll need to put in a lot more effort in sealing the Nine-Tails next."

Mito patted Kirito's head with her other hand and said with satisfaction.

"Teacher, I have just witnessed the power of the Nine-Tails. With my current abilities, I'm afraid I can't subdue it."

Upon hearing this, Kirito said with a slight headache.

That's the absolute truth. With his current strength, he probably wouldn't have a problem escaping from the Nine-Tails, but subduing it would be incredibly difficult.

"Don't worry, I'm here. How far have you progressed in your Yin Seal cultivation?"

Mito said calmly.

Her physical condition is indeed very bad right now, but she can still do it if she makes one last effort before she dies.

"At my current rate of chakra accumulation, it will probably take about six months to complete."

Kirito answered truthfully.

He began cultivating the Yin Seal a year ago.

However, accumulating chakra is destined to be a time-consuming and laborious process. Even with White Zetsu clones, which can quickly restore chakra, he cannot complete it in a short time.

Moreover, he might be much bolder than Tsunade and Sakura Haruno.

In order to successfully master Sage Mode, he created a vast chakra pool within his body using the Yin Seal, reaching the pinnacle of his chakra control. If he were to complete the accumulation, his Yin Seal would likely contain a tailed beast-level amount of chakra.

That's right, the powerful Yin Seal was an important piece of the puzzle for him to learn Sage Mode before he completed the bloodline fusion experiment.

"Your appetite is as big as ever. Fine, before you leave, let me lend you a hand."

Upon hearing Kirito's reply, Mito lightly flicked Kirito's forehead with her finger and smiled.

Before Kirito could react, a vast and warm chakra flowed through Mito's hand that was holding his.

"Keep quiet and accept it."

Kirito wanted to speak up to stop them, but Mito interrupted him.

Kirito looked at Mito's familiar, kind expression and couldn't help but feel tears welling up in his eyes. He immediately closed his eyes to stop the tears from flowing, and then focused on receiving the chakra that Mito was transmitting, continuously channeling this chakra into the chakra pool that he had created using the Yin Seal.

For a moment, a small rain of chakra fell from the sky above the chakra pool opened up by the Yin Seal within Kirito's body.

Blue chakra raindrops fell continuously into the chakra pool, quickly filling the pool, which was only two-thirds full.

A moment later, a blue diamond-shaped mark appeared between Kirito's eyebrows.

The Yin Seal technique has been successfully mastered!

Chapter 99: The Teacher's Last Gift

When the Yin Seal mark was completed, Kirito instantly felt the pressure that had prevented him from using his chakra at full power due to maintaining the Yin Seal disappear instantly, and his chakra even experienced a surge.

This is because the chakra in the Yin Seal is fully charged, and it begins to output chakra at a low power to feed back to its master, Kirito, thereby indirectly increasing the normal amount of chakra in his body.

The feedback from a Yin Seal that accumulates Tailed Beast-level chakra is undoubtedly astonishing. Even if it's just a little bit, Kirito feels that his chakra has indirectly increased by two or three levels, reaching the level of an elite Chunin.

For a moment, Kirito felt his whole body filled with power.

The Yin Seal is a secret technique developed by the Uzumaki clan. Its main function is to store chakra. It is not the Hundred Healings Seal that Tsunade developed later based on the Yin Seal. Therefore, it does not have the ability to instantly heal, enhance attacks, or increase speed. However, it does have the function of preserving youth, improving physical functions, and keeping physical functions at their peak.

This is all the function of the Yin Seal that Mito taught him.

Kirito estimates that the Hundred Healings Seal developed by Tsunade is also related to her family's secret techniques, Super Strength Fist and Palm Healing Technique. It is very likely that she combined the Yin Seal, Super Strength Fist and Palm Healing Technique together to give the Hundred Healings Seal the effects of all three.

"The Yin Seal, this brat actually mastered this sealing technique first. What an amazing brat."

Tsunade looked at the blue diamond-shaped mark on Kirito's forehead and admired it in her heart.

The difficulty in mastering the Yin Seal lies mainly in having extremely strong chakra control, which she already possesses; all she needs to do now is brush up on her knowledge of sealing techniques.

Since stepping onto the battlefield, she discovered that her once-proud chakra reserves were far from sufficient to heal all her teammates. She then remembered this sealing technique that could provide a large amount of chakra and had been trying to master it. However, she was constantly fighting and using the Palm Healing Technique to heal her comrades every day, so she simply didn't have the time or enough chakra to master the Yin Seal.

I finally made it back to Konoha this time, and I'm planning to learn this sealing technique.

She never expected that before she could learn it, a younger kid had already learned it before her.

However, she felt no jealousy, only admiration and joy, because her grandmother's sealing technique had been passed down to a successor.

The younger generation of Konoha has done a good job of passing on the knowledge of their predecessors, just like the Will of Fire, which is something to be very happy about.

"Mito-sensei, that's enough, please stop now."

Kirito realized that he had successfully mastered the Yin Seal, but Mito did not stop the chakra transfer and immediately said something.

"Has it been successful? Then let's cultivate another one, but this one can't be as big as the previous one."

Mito smiled slightly, looking at Kirito with her bright eyes.

Kirito was shocked by Mito's words. Looking into Mito's eyes, he felt as if all his secrets had been seen through.

Before he could speak, Mito said to the others in the room, "You all should leave. Let Kirito and I be alone for a while."

When Momoka heard Mito's words, she wanted to say something, but she was glared at by Mito and immediately shut up and obediently went out.

If Momoka, the Hokage's advisor, was like this, what could the others say? They all obediently went out and waited outside.