Chapter 77: Chapter 77: Researching the Rasengan

After arriving at a secluded, empty training ground, Natsuki raised his hand.

Projection Magecraft!

A kunai appeared in his hand.

Natsuki flicked his wrist fiercely.

The kunai flew straight toward a tree not far away.

As it pierced the trunk, the kunai trembled violently. The chakra contained within surged outward.

BOOM!

The kunai exploded.

A small crater formed on the tree trunk with the kunai at its center.

Nonou watched, feeling very confused.

Why did a kunai explode?

There was no explosive tag attached to it.

Moreover, the power of this explosion was far inferior to an explosive tag.

Natsuki nodded in satisfaction.

The power generated by a projected kunai combined with Broken Phantasm was indeed inferior to an explosive tag.

But this was a cost-free explosion—saving money compared to explosive tags.

Furthermore, most ninjas were squishy, so an explosion like this could still cause significant injuries.

Most importantly, it was impossible to guard against.

Who would expect a kunai to suddenly explode?

Natsuki quickly thought of another use.

Projection Magecraft!

A replica of Kurosawa appeared and was grasped in his hand.

He threw it directly.

Kurosawa hit the tree, burying a third of its blade into the trunk.

Broken Phantasm!

Natsuki snapped his fingers.

Kurosawa exploded amidst its trembling.

CRACK!

The tree was blown in half at the trunk.

First, because a third of Kurosawa’s blade was embedded—making it equivalent to an internal explosion.

Second, because Kurosawa contained more chakra than a kunai, resulting in a more powerful explosion.

Natsuki couldn’t help but smile.

As the saying goes—who would expect a thrown ninja sword to explode?

Projection Magecraft combined with Broken Phantasm undoubtedly possessed the power of a "first-sight kill."

The so-called "first-sight kill" was actually the embodiment of "ninja battles are information battles."

When facing a ninjutsu for the first time, ninjas were easily instantly killed or heavily injured.

"How was that?"

Natsuki turned to look at Nonou.

"Very powerful."

Nonou said softly.

But because Natsuki had always been very powerful in her mind, her surprise quickly faded.

"Let’s go. We’re heading to Lady Mito’s place."

Natsuki pinched her small cheek and left the training ground with her.

Soon, they arrived at the Senju clan compound.

Nawaki, Minato, and Kushina were already training.

"Nawaki." 𝑓𝓇𝘦ℯ𝘸𝘦𝑏𝓃𝑜𝘷ℯ𝑙.𝑐𝑜𝓂

Natsuki considered. "I feel like I can start the second stage of Water Release chakra nature transformation training."

Once the second stage of training was complete, his Water Release chakra nature transformation would basically reach the proficient level.

Then, Ability 4 of his Kamado Tanjiro template could be unlocked.

"Follow me."

Nawaki put away the Greatsword Samehada and led him to a nearby river.

Without speaking, he directly extended his hands.

In the next second, under his control, a stream of water swirled and swayed in mid-air like a dancing snake.

"Water Release has two characteristics: one is moisture, and the other is flow."

Nawaki explained. "The first two stages of Water Release chakra nature transformation training correspond to these two characteristics."

"This flowing characteristic seems to be related to chakra shape transformation."

Natsuki said thoughtfully.

"It is indeed related."

Nawaki nodded. "Because flow involves chakra shape transformation."

Ninjutsu had three foundations.

First, chakra control ability.

Second, chakra shape transformation.

Third, chakra nature transformation.

Powerful ninjutsu often involved all three.

Of course, there were also some that involved two—such as the Rasengan, which didn’t involve chakra nature transformation.

Looking at the flowing water, Natsuki’s thoughts stirred.

Wasn’t this the best excuse to "create" the Rasengan?

The Rasengan was a ninjutsu created by Namikaze Minato, modeled after the Tailed Beast Ball.

But Natsuki hadn’t seen a Tailed Beast Ball and wouldn’t be able to see one in the short term.

Unless he asked Uzumaki Mito for help.

However, a Tailed Beast Ball was so dangerous. She definitely wouldn’t casually fire one off just to help him create the Rasengan.

Moreover, given her current old age, releasing a Tailed Beast Ball might accelerate the consumption of her lifespan.

"I suddenly have an idea for a new ninjutsu."

Natsuki spoke up.

"Ah?"

Nawaki suddenly turned his head to look at him.

No, bro, is creating ninjutsu that easy?

And wasn’t I just teaching you Water Release chakra nature transformation training?

Why do you suddenly have an idea for a new ninjutsu?

"But the requirements for this ninjutsu are quite high."

Natsuki smiled. "I’ll ask Kushina and Nonou for help later."

He had also just thought of it.

The Rasengan required extremely high chakra control.

Kushina and Nonou perfectly met this condition.

The reason was that sealing jutsu and medical ninjutsu were the two most difficult types of ninjutsu.

Without extremely high chakra control, it was simply impossible to learn them.

Moreover, having Kushina and Nonou help wouldn’t change the fact that the copyright of the ultimately created Rasengan would still belong to him.

After all, the two of them wouldn’t try to steal the credit.

"Let’s continue training Water Release chakra nature transformation."

Nawaki wanted to say something but stopped, eventually saying sullenly.

Time reached noon.

Everyone paused their training and gathered to prepare for lunch.

"Watching Nawaki control the rotating water flow just now gave me an idea for a new ninjutsu."

Natsuki spoke up. "But I need Kushina and Nonou to help me."

"I can help?"

Nonou was slightly taken aback. Somewhat in disbelief.

"What ninjutsu? How can I help?"

Upon hearing this, Kushina became excited.

Minato, on the other hand, had a look of astonishment.

So sudden?

And didn’t you just create a flight-type ninjutsu?

"If you compress a surge of chakra and spin it at top speed, what do you think would happen?"

Natsuki asked.

Everyone instantly fell into thought.

"If this chakra exploded, the power would definitely be extraordinary."

Nawaki clenched his fists.

"Not only that."

Minato said in a deep voice. "It wouldn’t even require hand seals."

After speaking, he couldn’t help but sigh inwardly.

Natsuki truly gave him a feeling of being powerless to catch up.

"That’s right!"

Nawaki realized. "This is a seal-less ninjutsu."

In the ninja world, ninjutsu that didn’t require hand seals were exceedingly rare.

"I call this ninjutsu the Rasengan."

Natsuki smiled.

"Rasengan? It sounds a bit too simple."

Minato thought for a moment. "How about calling it the Halo Gale Jet Black Arrow Zero Style?"

Nawaki, Kushina, and Nonou all looked at him with surprised expressions.

"What’s wrong? Is this name not good?"

Minato asked, confused.

"Your naming sense is truly... unique."

Nawaki’s mouth twitched.

"It’s too complicated. Rasengan sounds much simpler and easier to understand."

Kushina evaluated.

Nonou nodded in agreement.

"Let’s talk about how to create the Rasengan."

Natsuki brought the topic back on track.

"Do you already have some ideas?"

Minato asked curiously.

"A few."

Natsuki extended his hand. "I think the first stage is to gather chakra in the palm of the hand."

After he finished speaking, Minato and the others also began to try.

The first stage wasn’t difficult. They could all do it—but the time it took varied.

The fastest were Kushina and Nonou, followed by Natsuki, and lastly, Nawaki and Minato.

"The second stage is to continuously and steadily release chakra, making the chakra move irregularly in the palm of the hand."

Natsuki continued.

Shortly after he finished speaking, the chakra in Nawaki and Minato’s hands suddenly exploded.

Obviously, they couldn’t control the chakra to move irregularly.

The chakra in Kushina and Nonou’s hands, however, began to flow irregularly.

But they didn’t last long before it also exploded.

The chakra in Natsuki’s palm did the same.

"This second stage feels really hard."

Nawaki frowned.

"Wait for me a moment."

Natsuki told them and went to a nearby store.

He bought a lot of water balloons and rubber balls with money and then returned.

"I just thought of a method: using water-filled balloons as an aid."

Natsuki explained. "We use chakra to make the water inside the balloon move irregularly until the balloon pops."

"This method sounds much simpler!"

Kushina couldn’t help but say. "Natsuki, you’re really too smart!"

"Indeed."

Minato nodded. "To think of so much in such a short time—it’s simply unbelievable."

"So it makes sense that Natsuki can create so many ninjutsu."

Nawaki said with admiration.

"Let’s continue training."

Natsuki coughed lightly.

In the original story, the Rasengan was arguably the only ninjutsu whose learning process was explained very clearly.

Now that his strength was approaching Jonin level, he was qualified to replicate it.

"What are you guys doing?"

Tsunade walked in and found Natsuki and the other three sitting in the courtyard, each holding a water balloon.

"Sister, we’re creating a ninjutsu!"

Nawaki said excitedly.

Tsunade was slightly taken aback.

What do you mean you’re creating a ninjutsu?

Does spending too much time with Natsuki make the talent for creating ninjutsu contagious?

"It’s like this."

Nawaki briefly explained the cause and effect.

"A seal-less ninjutsu? Rasengan?"

Tsunade instinctively fell into thought.

Although Nawaki only mentioned two stages, she could already imagine that the power of the Rasengan would definitely not be weak.

Even at her level, the Rasengan could still be effective.

"Teacher Tsunade, do you want to learn? I can teach you."

Natsuki asked with a smile.

"What are you saying, you little brat?"

Tsunade snapped back to reality, walked up to him, and flicked his forehead hard.

Seeing this, Nawaki couldn’t help but wink and make faces.

Finally, someone was receiving the same treatment as him.

"You guys figure it out first."

Tsunade withdrew her hand.

If she participated, the progress would indeed be much faster—but it wasn’t necessary.

First, it would steal their credit.

Second, letting Nawaki and the others develop the ninjutsu themselves would be highly beneficial to them.

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