Rasengan

While Sunagakure was on the verge of chaos, the Konoha Ninja were living quite comfortably.

In a brand-new training ground in Konoha, a blond youth wearing Jonin Vest looked at his three students with a smile.

"Everyone has been doing exceptionally well lately!" Namikaze Minato didn't hold back his encouragement. "Your efficiency in completing missions has impressed even the Lord Hokage. I believe that after experiencing so many missions, you have a much better understanding of the ninja profession."

"Of course, Minato-sensei!" Uchiha Obito clenched his fists excitedly. "Those missions are a piece of cake for me. I'm the genius of the Uchiha Clan!"

"Really? I wonder who got completely fooled by a wild beast last time, and ended up having to trouble me in the end." Kakashi, with his deadpan expression, immediately retorted without holding back.

"What? You wretched bastard, I just didn't want to..."

"Alright, alright," Namikaze Minato quickly smoothed things over. He was quite different from the Uchiha; he was a master at creating a good atmosphere within the team. "Well then, as a reward for your outstanding performance lately, I have two pieces of good news for you!"

These words immediately attracted Uchiha Obito's attention, and Kakashi and Rin, who were standing nearby, also became curious.

"First of all, because of your outstanding performance in the past few months, the village has granted you a special period for individual training, during which I will personally guide you."

"Great!" Uchiha Obito immediately shouted, and Rin also showed a happy smile. Kakashi's expression did not change, but he must have been very happy to do so as well.

"Next up are Obito and Rin's Chunin Ninja Exams." Namikaze Minato's good news wasn't over yet, "There's not enough time this year, so I'll recommend you two to participate in next year's Chunin Ninja Exams. So good luck now!"

Amid Obito's cheers, Namikaze Minato had the three of them split up and begin their individual training sessions, after which he would go over to each of them to provide targeted guidance.

The training plan for Obito and Rin was prepared in advance.

The former hasn't Sharingan yet, so he compiled a Fire Release training manual from the Third Hokage and his teacher Jiraiya, which is very suitable for the current Uchiha Obito.

He also obtained the training method for Medical Ninjutsu from the Medical Unit and gave it to Nohara Rin, along with some guidance on the related chakra usage techniques.

After making the arrangements, Namikaze Minato headed towards Kakashi's training area. He intended to learn more about this genius who had become a Chunin at the age of six and see how he could help him improve.

As he approached Kakashi's location, a slightly dazzling white light flashed through the air. Just as he was momentarily stunned, he saw a large amount of unusually bright chakra reappear in Kakashi's hand.

"Crackling, crackling..." Lightning Element Nature Transformation surged forth continuously, accompanied by a chattering sound, making it seem unusual at first glance.

Without interrupting him, Namikaze Minato watched intently from the side until Kakashi was panting heavily before he came over.

"Minato-sensei."

"Hmm, you were practicing Lightning Release just now, right? As far as I remember, there seem to be quite a few Ninjutsu in the village that can release Lightning Release with one hand. If you don't mind, could you let me learn about it?"

"This..." Kakashi took a breath and continued, "This is a prototype of an S-rank Ninjutsu developed by Shuichi. Although after his explanation I realized I was too early to learn this technique, I still borrowed some of its training methods, which not only work on Lightning Release Ninjutsu but also enhance the power of other Ninjutsu."

Namikaze Minato, who had been calm and collected, was startled by his words. Shuichi was the same age as Kakashi, and at that age, Kakashi was still in the Ninja Academy. Now, he was saying that Shuichi was developing S-rank Ninjutsu. This was just too unbelievable.

He had originally planned to give Kakashi some advice, but then he suddenly remembered that Shuichi Orochimaru's disciple and a genius who had mastered multiple elemental attributes at a very young age. It wasn't impossible for the Shinobi World to have such an incomprehensible freak. So he tentatively asked Kakashi to explain in more detail.

"The first requirement for this technique is to concentrate a large amount of high-intensity chakra in the hands. There are two ways to do this: either strengthen the force of transmitting chakra into the meridians of the hands, or first increase the strength of the chakra within the body."

"Since we're all quite young, increasing the output of our meridians isn't advisable, so we can only focus on increasing the intensity of our chakra. Shuichi taught me a method of compressing chakra within the body. Practicing this will not only solve the problem of getting started with this technique, but also incidentally enhance the power of other techniques."

At this point, Kakashi felt his stamina had recovered considerably, and he could demonstrate it more clearly. "I've almost mastered chakra compression, but my endurance is different from Shuichi's. Even if I compress it to the limit now, it's still a bit lacking. So I can only try to work on strengthening my meridian output."

He began channeling chakra into his hands again. "This way, the power of any Ninjutsu released through both hands can be enhanced, such as many Earth Release Ninjutsu, not just that unfinished Lightning Release Ninjutsu."

When the topic of chakra compression came up, Namikaze Minato's pensive expression froze for a moment. After Kakashi demonstrated it again, a thought flashed through his mind.

"That's right, compressing chakra can greatly increase the power of Ninjutsu, so my technique..."

Before long, Namikaze Minato came to his senses. Now was the time for him to guide his disciple's training. The surprise of his Ninjutsu inspiration had almost made him go astray.

"I see. It seems I can't offer much guidance on Ninjutsu; your current training is perfectly suited to you." After gaining a clear understanding of Kakashi's training, Namikaze Minato realized there wasn't much he could teach.

"However, I observed during the mission that you still have some issues with chakra usage, and your fighting style is still primarily based on swordsmanship, right? So, could you tell me about your rapid movement..."

Unlike the other two students, Kakashi, who had Chunin several years, was now far ahead of them and could accept more advanced training content.

After finishing his instruction of Kakashi, Namikaze Minato suddenly said somewhat embarrassedly, "Kakashi, um... I wanted to ask where I can find Shuichi? I have some things I'd like to discuss with him. If it's too much trouble, then never mind."

"Hmm?" Kakashi was a little puzzled, but didn't ask further. Shuichi to play mysterious games. "His house is next to the central reservoir... He usually lives behind the Hokage Rock... There's a large open space there, so it's easy to find him."

"Oh, I see. Thank you!"

In the winter of Konoha Year 46, the weather was clear, and it was already afternoon.

Shuichi walked home after leaving Orochimaru's Laboratory. His research on the Cursed Seal had yielded some results, and although it was only just getting on track, Orochimaru had still produced quite a few useful byproducts.

For example, Orochimaru had already developed half of the Face-Concealing Technique facial features based on the characteristic of the Cursed Seal that could change a person's body.

Shuichi, a man with a moral compass, would never casually smear off a dead person's face and put it on. He learned a similar technique from Orochimaru, which should now be called the Face-Altering Technique. It allows him to subtly adjust his face, ultimately transforming himself into a completely unrecognizable stranger.

Therefore, he was in a very good mood. As long as he got a little older, it would be much easier for him to carry out disguise missions, and he could even turn into someone no one knew and cause trouble in the dark.

When I got to my front door, I found someone standing there.

"Senior Minato?" Shuichi little surprised. Usually, only a few acquaintances would come to see him. Even Orochimaru had never come in person. Why would Namikaze Minato suddenly come to see him today?

"It's Shuichi-kun! You're back so early!" Namikaze Minato was pleasantly surprised. He felt it would be impolite to disturb Shuichi's training or knock on his door, so he took some time to arrive at Shuichi's house ahead of time.

I had planned to wait a long time, but I didn't expect Shuichi to return home so quickly today.

"Haha, well..." Namikaze Minato chuckled sheepishly and scratched his head. "Excuse me for bothering you, Shuichi-kun. Do you have a moment? I came to see you specifically about a Ninjutsu. If you're busy, then forget it."

"Ninjutsu?" Shuichi puzzled. He hadn't mentioned anything like the Flying Thunder God Technique, and Namikaze Minato could ask the Third Hokage and Jiraiya, so why would he suddenly come to him?

Thinking he had nothing else to do, he politely replied, "I have a lot of free time today, and I don't know what to do later. Since it's a question about Ninjutsu, let's find a training ground and talk as we walk."

"Phew... thank you so much."

The two discussed the Ninjutsu as they walked towards the training ground in the forest on the edge of the village.

"Because there aren't many Ninjutsu in the village that suit me, and also because of my personal fighting style, I've found that regular Hand Seals Ninjutsu isn't very effective for me. Therefore, more than a year ago, I decided to develop a Ninjutsu that doesn't require Hand Seals, based on my Wind Release."

Shuichi immediately realized upon hearing this; it was clearly the Rasengan.

This signature Ninjutsu, which runs throughout the entire Hokage, is a magical Ninjutsu that Naruto has been working on from beginning to end, and he can even stuff anything into it. Anyway, he just can't understand why adding the will of the dead can increase its power.

"Wow, Senior Minato!" Shuichi exclaimed. Having been in this world for so long, he knew that mutual flattery was the norm in conversation and was quite adept at it. "The No-Seal Ninjutsu is completely unconventional; if it succeeds, it will be truly remarkable."

"Haha, you flatter me," Namikaze Minato said. "My development process is currently stuck in a rut, and I was at a loss about it until recently when I saw Kakashi training in Lightning Release. That's when I learned that you, Shuichi-kun, are already researching S-rank Ninjutsu. I'm truly ashamed of my own talent."

"The reason I suddenly came to see you is for this reason. Seeing Kakashi's training gave me a crucial clue to success, but after trying it myself, I found it wasn't quite right, so I can only..."

"It's alright, I also want to see the power of this no-seal Ninjutsu." Before they knew it, the two had already arrived at the training ground.

Namikaze Minato led Shuichi to a tree. "Well then, Shuichi-kun, let me show you first."

He raised his right hand, and all his chakra surged into the meridians in his hand, forming a blue sphere entirely composed of chakra.

"This is the Ninjutsu I developed without hand seals, which generates power through rapidly rotating chakra." As he spoke, he controlled the danjutsu with incredible speed, aiming it at the tree.

"Boom!" After a not-so-strong impact, Shuichi looked closely and saw that a small section of the tree's center had sunk, and the surrounding area was covered with spiral-shaped marks.

As the smoke cleared, Namikaze Minato said with a hint of helplessness, "As you can see, because I had to forgo Hand Seals, I could only compensate for the power by increasing my chakra output."

After he finished demonstrating, his expression became more serious. "My chakra nature is wind. To develop corresponding Ninjutsu, I can only start from two aspects: Nature Transformation and Shape Transformation."

"Since this technique is a no-seal Ninjutsu, the only way to directly increase its power is through Shape Transformation. My inspiration comes from the characteristics of Wind Release, which allows chakra to rotate at high speed to generate destructive power, but its power is currently lacking. Directly adding Nature Transformation would offer no advantage compared to other Wind Release Ninjutsu."

Speaking of which, Shuichi recalled the various Wind Release he had acquired, and that was indeed the case.

The current Rasengan, with its added Nature Transformation, seems like a successful new technique, with its difficulty and power around B-rank. However, compared to the B-rank Wind Release, which requires Hand Seals, this technique offers no advantage whatsoever.

It can be compared to the B-rank Wind Release: Vacuum Wave. With the same cutting effect, this technique consumes far more chakra than Vacuum Wave. At the same time, it requires constant close-range attacks on the enemy, which increases the risk of being counterattacked.

Vacuum Wave only requires a little time to Hand Seals, and it not only has the advantage of long-range attack, but its attack range is also much larger than this technique. Therefore, it seems to be a very useless Ninjutsu. If you can only hit someone at close range, you might as well just take a sword and slash.

"When Kakashi mentioned chakra compression, I realized that this technique's power in terms of Shape Transformation could be greatly enhanced," Namikaze Minato said excitedly. "After asking him about it, I learned that Shuichi-kun has already reached a very high level of mastery in chakra compression, so I've asked you here today to see if you can help me."

So that's how it is. In the original story, Minato spent three years perfecting the Rasengan. Now, after observing the marks on the tree, he discovered that he was in the third stage of the Rasengan, having achieved the ultimate spin.

Shuichi estimates that the final compression stage was when Minato witnessed the process of the Tailed Beast Ball condensing energy during the Third Shinobi War, which ultimately allowed him to complete the technique.

Thinking of this, he didn't keep anyone in suspense. "Senior Minato's technique truly opened my eyes. I also have some ideas on how to enhance the power of this chakra ball."

"It's clear that this technique already has decent cutting capabilities. To further enhance its power, I think we could increase the chakra output and then compress the rotating chakra..."

Shuichi can actually use the Rasengan, but it's a bit difficult to release with one hand. Using a Shadow Clone to help makes it much easier.

Furthermore, since Namikaze Minato personally sought him out this time, it wouldn't be a bad deal to do a favor for the future Hokage. He might even be able to get his hands on the Flying Thunder God Technique ahead of time. Therefore, he generously told him the details of the finished Rasengan, mainly the final compression and condensation method.

An hour later, in Konoha's most upscale restaurant, Shuichi was devouring all sorts of exquisite dishes on the table with his chopsticks, his mouth never stopping.

After hearing what Shuichi told him, Namikaze Minato was initially overjoyed that his Ninjutsu research would soon be successful. Only then did he realize that he owed Shuichi a huge favor, as this chakra technique was extremely valuable in the Shinobi World.

"I'm glad you're satisfied, Shuichi-kun." Seeing him eating so happily, Namikaze Minato gave a slightly goofy smile. "You really helped me a lot this time. I'll let you know as soon as the Ninjutsu is successful. You can come to me for anything in the future."

"Hmm, um... no problem." Shuichi. Asking about Flying Thunder God directly now would seem too foolish and would arouse suspicion.

By the time Minato becomes famous for using this technique in the Third Shinobi War, he should have accumulated enough merit, and at the same time, he should be able to ensure that the Flying Thunder God is fully improved by then.

"You have to wait a long time to catch a big fish. No rush, no rush."