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Resets Weekly! [Monday]
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As Kakashi Hatake's blade descended, Kai Mitarashi's body was split into two. Strangely, however, not a single drop of blood was spilled.
Bang!
A puff of smoke dispersed, revealing that Kai's "body" was actually a wooden log cut cleanly in two.
"Substitution Jutsu! When did he use it?"
Kakashi's heart tightened. He hadn't seen Kai form any hand seals at all.
Wind Release: Vacuum Sphere!
Suddenly, Kai appeared behind Kakashi, launching a ninjutsu attack directly at him.
Bang!
The Vacuum Sphere struck Kakashi, but his figure vanished in a puff of smoke—it had only hit his shadow clone.
"Impressive. You managed to use a clone jutsu to dodge that in an instant," Kai praised, looking at Kakashi.
"If I hadn't instinctively used a clone jutsu when I saw his Substitution Jutsu, that Vacuum Sphere might have hit me directly," Kakashi thought, panting heavily. His eyes were locked onto Kai, not daring to miss a single movement.
Without any intention of pausing, Kai reached into the ninja tool pouch at his waist and pulled out a kunai.
Holding the kunai in his hand, he charged straight at Kakashi.
Clang! Clang! Clang!
The spectators on the sidelines could only see the blurred figures of the two combatants and hear the continuous clash of short blades and kunai.
"Are they really just academy students?" Takajirō, watching from the side, couldn't believe that his students were stronger than him—and not just one, but two of them!
"Wow, I didn't expect Kai Mitarashi to be proficient in ninjutsu as well."
"Kakashi is amazing too!"
After a few breaths, Kakashi seized an opportunity to leap out of the fray, panting heavily as he looked at Kai, who showed no signs of fatigue. Kakashi's expression turned grim.
"I didn't expect you to be this strong."
"I already told you, I have no interest in fighting you. Right now, you're simply not my match. Well, it's time to end this duel," Kai said indifferently.
Mitarashi-Style Ninja Tool Throwing: Ten-Faced Ambush!
A dozen shuriken, mixed with several kunai, shot toward Kakashi from all directions.
Clang! Clang! Clang!
The shuriken and kunai collided mid-air multiple times, scattering like birds in flight as they aimed for Kakashi's throat, chest, and forehead.
From every direction—front, back, left, and right—the projectiles left no openings for escape.
Dodging was impossible; blocking was the only option!
This was a ninja tool throwing technique developed by Kai, based on his mastery of ninja tools.
Mitarashi-Style Ninja Tool Throwing: Ten-Faced Ambush!
Of course, Kai didn't aim to kill Kakashi. For instance, he didn't attach explosive tags to the kunai handles. Still, Kakashi found himself struggling to fend off the relentless attacks.
Wind Release: Great Breakthrough!
This time, Kakashi didn't have the luxury of using a clone jutsu to evade. He took the full force of Kai's Great Breakthrough, his body being blown away.
"You've lost!"
Before Kakashi could stand up again, Kai had already pressed a kunai against Kakashi's neck.
"I lost," Kakashi admitted, his expression dark.
As Kakashi sheathed his short sword, Kai also put away his kunai and turned toward the academy gates. Watching Kai clearly skip class, Takajirō opened his mouth to speak but ultimately said nothing.
For a student of Kai's caliber, Takajirō truly didn't know how to stop him.
At the Mitarashi Residence
Kai sat cross-legged on the floor, staring at a pile of shattered rubber balls in front of him with a troubled expression.
"I've mastered the second stage of the rubber ball practice, even to the point where I can tear the ball into dozens of pieces. But I didn't expect the final step—maintaining it—to be so difficult!"
Anyone familiar with the original story would immediately recognize what Kai was working on.
Kai was developing none other than the famous A-rank ninjutsu from the series—the Rasengan!
The Rasengan, a non-seal ninjutsu inherited by Naruto Uzumaki from Minato Namikaze, was arguably Naruto's most powerful technique.
However, at this point in time, Minato had not yet invented the Rasengan. But Kai, who was familiar with its entire training process, couldn't resist developing it ahead of time.
After all, the Rasengan wasn't just an ordinary A-rank ninjutsu—it was an attribute-less, scalable technique with an initial level of A-rank.
Naruto later developed numerous powerful S-rank variants of the Rasengan, such as the Big Ball Rasengan, Wind Release: Rasengan, Wind Release: Rasenshuriken, and Sage Art: Wind Release: Rasenshuriken.
After merging with Asura's bloodline, Kai discovered that his chakra had transformed from pure wind nature to all five natures—wind, fire, lightning, earth, and water.
Although possessing all chakra natures, spreading his focus across all of them would be a waste of time and effort. On the other hand, specializing in just one or two would squander his innate talent.
The Rasengan, being a non-seal ninjutsu, perfectly solved this dilemma. Once mastered, Kai could simply incorporate the corresponding nature transformations, allowing the technique to evolve into entirely new forms!
For example, during the Fourth Great Ninja War, Naruto used Four-Tails chakra to unleash Lava Release: Rasenshuriken and One-Tail chakra to create Magnet Release: Rasengan.
Such a versatile technique was perfectly suited to Kai's abilities, so how could he not develop it?
Initially, Kai thought the Rasengan would be relatively simple, given that Naruto had mastered it in just one week.
But after three months, Kai had only completed the first two stages. The third stage remained elusive.
"No wonder it took a genius like Minato Namikaze three years to invent this jutsu—it's definitely not easy. Naruto mastering it in a week must have been purely for plot convenience," Kai muttered, resting his head on his hand as he complained.
"The story explained the first and second stages of Rasengan training in detail but barely touched on the third stage—maintaining it. Naruto stabilized it using both hands, but that method has significant drawbacks and is definitely not ideal."
"Rasengan… Spiral… Rotation… That's it! Rotation is the key! The first and second stages went so smoothly that I forgot the true essence of the Rasengan—using high-speed chakra rotation to deal damage to the enemy!"
Realizing this, Kai grew excited and extended his right hand.
A blue light appeared in his palm, surrounded by whirling chakra that began to expand. Within a few breaths, a pale blue chakra sphere formed in his hand.
Rasengan! Training complete.
Looking at the glowing blue Rasengan in his hand, Kai murmured, "It's time to apply for graduation from the academy. But before that, there's one more thing I need to do."
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