Chapter 161: Various Experiments for Synthesizing the Rinnegan
"Haha, well said!"
Yasushi was extremely satisfied with Shinyo's answer.
He reached into his clothing and pulled out two pairs of three-tomoe Sharingan, holding them before the two women.
"I said before I'd make you Uchiha clan members, but back then your physical conditions were too poor. Rashly transplanting Sharingan wouldn't benefit your bodies—it might even drag down your recovery speed."
"I see you've now restored your bodies' deficiencies. Why not transplant the Sharingan to you today and make you official Uchiha clan members?"
"Ah, wonderful! Mom and I will both become Uchiha!"
Karin immediately cried out excitedly, hugging Yasushi's arm and bouncing up and down, as happy as a little rabbit eating carrots.
Haku watched from the side with envy written all over his face, practically drooling.
He also wanted to become Lord Yasushi's fellow clan member! But Yasushi showed no intention of giving him a pair of Sharingan.
Though he had many Sharingan, Haku's Ice Release didn't complement Sharingan. Even combined together, they'd only drag each other down with no value—purely wasteful.
But when the Uzumaki clan's Sage Body and the Uchiha clan's Sage Eyes combined, what kind of result would emerge—even Yasushi himself couldn't determine. But it definitely wouldn't be bad.
He had to admit these Sharingan were truly plug-and-play type, extremely simple to transplant.
No need to specifically find a laboratory or operating room. Just find a clean place, use some anesthetic to put the two women under, and lay them on beds.
Yasushi personally performed the procedure—directly removing and replacing eyes. He completed the surgery easily and effortlessly.
When others finished eye replacement surgery, they still needed time to slowly rest and recover. Yasushi had healing-type ocular jutsu—he just gave both women a treatment and they immediately recovered and were discharged on the spot.
The whole process took mere minutes. Just that fast!
"Wow, so this is the Sharingan? So clear!"
Karin rolled up from the bed, widening her eyes to look around everywhere. She even reached out to touch the tiny dust particles in the air, her face full of curiosity.
She'd been nearsighted before—the kind even Uzumaki clan physiology couldn't fix. Now with a new pair of eyes, her vision immediately underwent qualitative improvement. It was like evolving from 360p to 4K era! Everything looked beautiful.
Yasushi carefully examined her eyes, asking:
"How does it feel? Is the pressure from these eyes significant?"
Karin closed her eyes, carefully experiencing it for a while, then shook her head with a smile:
"They do continuously extract chakra, but I naturally have large chakra reserves. This extraction speed is slower than my recovery—I don't even need to worry about it."
Shinyo expressed the same thing. Only then did Yasushi relax. He continued:
"Try to see if you can close the Sharingan."
Karin tried for a long time but ultimately couldn't manage it. She could only shake her head with slight regret:
"Looks like I'm still not a true Uchiha clan member after all. These eyes can only stay like this—there's no way to change them back to original eyes."
Hearing this, Yasushi smiled and patted her small head reassuringly:
"Isn't this announcing to the outside world every moment that you're an Uchiha clan member? Isn't that good?"
With Yasushi's explanation, Karin immediately became happy again, clapping her hands repeatedly.
"Right, right! This is perfect!"
Yasushi suggested further:
"When you have free time from now on, try using your body's chakra to nourish this pair of eyes. Perhaps in the future you can make these eyes truly become your own."
"Really? That would be wonderful!"
After carefully checking and confirming no adverse reactions from the eye transplants, Yasushi asked:
"How's your study of the ninjutsu and sealing techniques I had you learn going?"
"Ah, we've completed the Three Basic Techniques. We've also mastered water-walking and tree-climbing. But sealing techniques are quite difficult—we can only say we've just entered the basics."
Before Yasushi left, he'd had Hiruko handle their ninjutsu foundation training.
Hiruko graduated from Konoha's ninja academy, so what he taught naturally followed that lineage—all the Konoha system.
Traditional, but highly efficient.
Shinyo and her daughter were both Uzumaki clan members with no shortage of chakra. Their daily practice was diligent, so learning basic ninjutsu was effortless.
However, Yasushi also knew the most suitable ninjutsu for mother and daughter was definitely the Uzumaki clan's sealing techniques. So he specifically obtained a copy of sealing techniques from Zetsu and gave them to Hiruko to guide their studies.
These techniques were secret transmissions even in Konoha. Hiruko had never learned them. Now having him teach while learning was essentially his tuition payment.
"Can you use Adamantine Sealing Chains and Eight Trigrams Sealing now?"
"Well... I can barely use Adamantine Sealing Chains, but my control isn't very good. If enemies struggle, they'll break free easily. I haven't started practicing Eight Trigrams Sealing yet."
"Perfect. I've brought you some material you can use for practice."
After speaking, Yasushi raised his hand. Space rippled, and a massive energy tail dropped from midair.
The original one had been given to Orochimaru. This one was naturally another contribution from One-Tail Shukaku.
"This is one of One-Tail Shukaku's tails. You can try using Eight Trigrams Sealing to seal it into Karin's body, making Karin a pseudo-jinchuriki."
"This tail has no intelligence. Its resistance won't be too fierce. Even if you fail, it's fine—just try multiple times."
"Fundamentally speaking, whether One-Tail or Nine-Tails, their chakra shares the same origin. The difference lies only in quantity—the quality is all extremely high."
"If you can fuse One-Tail's chakra with the body, it can greatly improve Karin's chakra quality. Perhaps it might even promote eye development to some degree."
Yasushi wasn't randomly experimenting. All these attempts were for synthesizing the Rinnegan.
He didn't have Ashura and Indra's chakra. Synthesizing the Rinnegan was extremely difficult.
The only currently known method was reviving the Ten-Tails, then sealing the Ten-Tails in his body to become the Ten-Tails jinchuriki and enter Six Paths Sage Mode.
Then, using the Ten-Tails' high-quality chakra as stimulus, his eyes would evolve into the Rinnegan.
But becoming the Ten-Tails jinchuriki wasn't easy to achieve. Subduing the Ten-Tails was also very difficult.
Don't look at how those people in the manga played with the Ten-Tails like a dog, absorbing it however they wanted—but they all had the Rinnegan.
The Rinnegan perfectly countered the Ten-Tails, just like how the Mangekyo Sharingan perfectly countered the Nine-Tails.
But trying to absorb the Ten-Tails with just the Mangekyo Sharingan probably wouldn't be that easy.
So Yasushi now needed to conduct various experiments, using other methods to synthesize the Rinnegan, or make the synthesis method simpler and more diverse.
Hiruko's side was one type of experiment. Shinyo and her daughter's side was another.