"What Ninjutsu?"
Hearing that Gojo Yoru was preparing to teach her a Ninjutsu, Uzumaki Kushina was instantly interested.
Looking at the balloons in Gojo Yoru's hand, Uzumaki Kushina seemed to think of something. Her expression changed slightly as she said, "Wait... don't tell me, besides the Phantom Body Flicker Technique, you've also developed other Ninjutsu?"
After all, the training method for a technique combining Clone Technique and Body Flicker Technique didn't seem to have anything to do with balloons no matter how you looked at it!
"Heh... your reaction is quite fast this time."
Gojo Yoru teased with a smile, then raised his right hand, palm facing up.
With a swish, like a sharp air blade cutting through the air.
A wisp of blue-white cyclone appeared out of thin air above Gojo Yoru's palm, spinning at high speed like a gear.
Gradually, this wisp of cyclone grew larger in volume and higher in density.
Upon closer inspection, it had multiplied from one into many, turning into a white core composed of countless small cyclones.
The blue energy on the outside grew from an initial thin film into a billiard ball-sized energy sphere, spinning irregularly at high speed.
From nothing to something, the two coexisting—the entire process of forming the Rasengan was simply a display of skill.
Even Uzumaki Kushina could see the difficulty of training this Ninjutsu.
Gulp...
Uzumaki Kushina stared dumbfounded for quite a while before swallowing her saliva. Looking at Gojo Yoru, she asked with a trembling voice, "Is this a... hand-seal-less Ninjutsu?"
"Correct. This is a non-elemental, hand-seal-less Ninjutsu called the Rasengan," Gojo Yoru smiled. "It has no requirements for Chakra attributes or nature transformation. As long as your Chakra control meets certain conditions, you can train in this Ninjutsu."
"Are you really going to teach such a precious Ninjutsu to me?" Uzumaki Kushina looked at Gojo Yoru in disbelief.
"Compared to me, the Rasengan is more suitable for you with your massive Chakra," Gojo Yoru said sincerely.
Why was Uzumaki Naruto in the original work able to conquer the world with just one move?
The reason was that the Rasengan and the Multi-Shadow Clone Technique were the Ninjutsu most suitable for the Nine-Tails Jinchuriki.
Apart from not being the reincarnation of Asura's Chakra, Uzumaki Kushina was an enhanced version of Uzumaki Naruto.
With the complete Nine-Tails and being an awakened member of the Uzumaki Clan, her Chakra was only stronger than Uzumaki Naruto's, not weaker.
Coupled with her natural monstrous strength, the Multi-Shadow Clone Technique, Rasengan, and Cherry Blossom Impact were the most suitable Ninjutsu for her.
Just imagine Uzumaki Kushina creating hundreds or thousands of Shadow Clones, with half of them holding Rasengans and the other half using Cherry Blossom Impact and Heavenly Foot of Pain. The thought of such a scene made one feel sorry for her enemies.
"Yoru, you..."
How could Uzumaki Kushina know about Gojo Yoru's cultivation plan?
At this moment, she was struck to the heart by Gojo Yoru's words. Her eyes moistened, uncontrollably misting up.
Looking at Gojo Yoru, who was willing to teach her such a super-rare hand-seal-less Ninjutsu after knowing her for only a few months, Uzumaki Kushina asked with a slightly choked voice, asking a question all girls loved to ask: "Why are you so good to me?"
However, facing this atmosphere perfect for farming affection points, Gojo Yoru gave a very buzz-killing reply: "No choice. Who asked you to live in the First Hokage's house? By currying favor with you, the young miss, now, I can walk sideways in Konoha in the future."
"...Gojo Yoru, you bastard!"
Sure enough, the emotion on Uzumaki Kushina's face instantly turned into teeth-gritting rage.
"Cut the crap, are you learning it or not?" Gojo Yoru said grumpily.
"I'm learning! A rare Ninjutsu for free, I'd be a fool not to take it!" Uzumaki Kushina bared her teeth again. "I'm going to use the Ninjutsu you teach me to teach you a harsh lesson."
"Save the sleep-talking for when you're dreaming," Gojo Yoru said with disdain, then threw a bag of balloons to Uzumaki Kushina. "Take these to the bathroom and fill them with water. I'll teach you the first stage first."
"Gojo Yoru, you will regret this!"
With a bang, the bathroom door was slammed shut violently.
Gojo Yoru felt a retort stuck in his throat, uncomfortable as it wouldn't go up or down.
Not knowing what words to use to strike back, he suddenly felt that he still hadn't integrated into this world; his bloodline wasn't pure at all.
But it's never too late for a gentleman to take revenge.
Gojo Yoru noted this grudge down. Ten years later, he would repay it a hundredfold!
Next, a training session destined to leave them soaked unfolded in Gojo Yoru's bathroom.
It was only because the Uzumaki Clan, like the Hyuga Clan, possessed innate talent for powerful Chakra control, coupled with massive Chakra amounts, that Gojo Yoru dared to teach the Rasengan to Uzumaki Kushina now.
If it were the previous Gojo Yoru, who calculated every step and worried all day that others would harm him, he would only have taught the secret of the Rasengan to Uzumaki Kushina after she became the Nine-Tails Jinchuriki.
But now, Gojo Yoru taught the Rasengan to Uzumaki Kushina in advance simply hoping she could quickly improve her strength so that she wouldn't be so afraid of Kurama after becoming the Nine-Tails Jinchuriki in the future.
Moreover, the Rasengan was a product of Chakra control. Once Uzumaki Kushina learned this Ninjutsu, learning the Cherry Blossom Impact and Sealing Jutsu would also require half the effort.
Conversely, this technique was a key to activating the Uzumaki Clan's Chakra control talent.
...
Dusk, at the Senju residence.
"Kushina, what are you doing?"
Tsunade, who had returned home from work, looked at Uzumaki Kushina, who was holding a water balloon but standing motionless, and couldn't help but lean in curiously.
"I'm trying to inject Chakra into it to make the water inside rotate irregularly and burst this water balloon without using force," Uzumaki Kushina said with a serious face, her gaze fixed on the water balloon in her hand.
"Is there any meaning to this?" Tsunade was even more puzzled.
If it was to train Chakra control, the Five Great Ninja Villages already had a systematic training regimen.
Basic level: tree climbing; intermediate level: water walking; advanced level: Medical Ninjutsu or Sealing Jutsu.
In this aspect, Uzumaki Kushina should have unique advantages.
Could it be that this was a new method she invented?
"This is... a secret."
Uzumaki Kushina was about to explain but suddenly remembered the rarity of hand-seal-less Ninjutsu and hurriedly shut her mouth.
Without Gojo Yoru's permission, she couldn't reveal the Rasengan.
"You brat, you won't even tell me, huh!" Tsunade instantly flew into a rage, raising her arm as if to teach Uzumaki Kushina a lesson.
"No can do, no can do..."
However, no matter how she threatened, Uzumaki Kushina refused to reveal a single thing.
Tsunade could only give up helplessly.
Returning indoors, Tsunade looked at Uzumaki Mito sitting at the kotatsu, still unable to suppress her curiosity: "Grandmother, do you know what Kushina is doing?"
"Tsuna, you are already an adult."
Uzumaki Mito smiled kindly. "As a senior, you shouldn't pry into the secrets between juniors."
"Alright."
Tsunade pouted like a child.
Unfortunately, no one had the luck to witness this final display of childlike innocence.