Night had fallen over the Akimichi clan compound. Tatsuya had been called over to Akimichi Rouyu's house after the banquet concluded.
"Is there a trick to the Butterfly Mode? Can other clan members learn it?" Rouyu asked, taking a sip of tea before setting the cup down and looking directly at Tatsuya.
Tatsuya sat kneeling opposite Rouyu, shaking his head gently. "The Butterfly Mode secret technique requires an enormous amount of chakra, and also demands extremely precise chakra control. It's impossible to use without a long period of dedicated training."
When he'd been called over, Tatsuya had already guessed something was up. It seemed the clan was interested in the Butterfly Mode, and had asked Rouyu, who was closest to Tatsuya, to inquire about it privately. Tatsuya didn't mind; he was prepared to tell the truth.
Rouyu frowned. "Then how were you able to learn it in such a short time?"
"Rouyu-ojisan, the reason I can use Butterfly Mode without the Three-Colored Pills is because I developed a sealing technique that can store a large amount of life energy and spiritual energy. The chakra control required for that sealing technique is even higher than that of Butterfly Mode. With that sealing technique, Butterfly Mode naturally became less difficult for me."
As he spoke, Tatsuya revealed the Yin-Yang Seal etched on his chest and abdomen.
"What a complex sealing technique! Did you really develop this?" Rouyu exclaimed, reaching out to feel the seal. His voice was filled with astonishment and relief.
The Yin-Yang Seal was a compound sealing technique composed of multiple sealing formulas, its complexity far exceeding Rouyu's imagination. This alone proved that Tatsuya wasn't lying. Rouyu couldn't help but feel a sense of wonder. Without him realizing it, this boy's strength had already far surpassed that of the older generation.
"Guaranteed authentic!" Tatsuya said, raising his head slightly, a hint of pride in his expression.
"Don't get cocky!" Rouyu chided, laughing.
"Since this method can't be disseminated throughout the clan, try to see if there are any suitable candidates within the clan. If we can produce one or two more clan members who can use this technique, then our Akimichi clan will truly flourish," Rouyu continued after a few seconds of contemplation.
"Rouyu-ojisan, don't worry. The clan will prosper," Tatsuya nodded, his voice firm and resolute.
With him around, it would be hard for the Akimichi clan not to become powerful!
The next morning, before Tatsuya could even leave his house, Akimichi Chouza personally delivered the key to the secret training room allocated to him by the clan. Tatsuya immediately rushed to inspect it, and was very satisfied with the clan's arrangements.
It was an underground secret chamber located not far from Tatsuya's residence. The entire chamber was over eight hundred square meters in area, consisting of an antechamber and a main chamber. Tatsuya's request for this training room wasn't actually for training; he intended to turn it into a small laboratory for ninjutsu research.
Ever since arriving in the ninja world, Tatsuya had been longing to engage in "scientific research." However, due to his own limitations, this plan had been shelved for a long time. Previously, when researching the Fujinhoin and clan secret techniques, the research subject was Tatsuya himself, and with the help of the bio-chip, a temporarily allocated training room was sufficient.
But now, those conditions were no longer adequate for Tatsuya's experimental needs. As his strength continued to increase, it was getting harder for basic, systematic ninjutsu knowledge to provide significant improvements. Tatsuya needed to conduct numerous experiments to obtain more information to enrich the bio-chip's database.
One example was Sage Mode training. Over a year ago, Tatsuya had obtained the method for training in Ryūchi Cave's Sage Mode from Orochimaru. Tatsuya had even used Sage Mode in actual combat. But his method was a shortcut. Tatsuya himself couldn't sense natural energy; he was able to use Sage Mode by directly absorbing natural energy from Seiryu.
This method had two drawbacks. First, the conditions for use were limited. Tatsuya had to be in a state where he had summoned Seiryu to successfully use Sage Mode. Second, the Sage Mode chakra's compatibility with Tatsuya's body was low, not only affecting the power of the Sage Mode but also causing irreversible damage to Tatsuya's body with repeated use. This was the main reason Tatsuya hadn't used Sage Mode during the battle in the Valley of Yugakure.
According to the training plan provided by the bio-chip, to successfully master Sage Mode, Tatsuya needed to continuously nurture and stimulate his body with natural energy for a long period, thereby enabling his body to sense and absorb natural energy from the outside world. This process would be extremely long, taking at least several years to complete.
Tatsuya wasn't planning to use this method to train in Sage Mode. The fastest method he could think of was cell fusion and body modification. Looking through the entire Naruto canon, nothing like this had ever appeared in the ninja world; Tatsuya needed to explore and research it himself.
And Sage Mode training was just one part of Tatsuya's "research" plan. Others, such as the Sharingan, Tenseigan, and Wood Release, were also on the list. These were things that couldn't be easily revealed! Establishing a secret laboratory was becoming increasingly urgent!
Inside the laboratory, Tatsuya bit his right finger and began to perform a summoning technique.
Poof!
A cloud of white smoke erupted beside him, and an orange-colored ninja cat appeared.
"Meow! Tatsuya-kun, what is your command?" The orange ninja cat looked up at Tatsuya, speaking in human language.
This orange ninja cat was Pakura's summoning animal, named Kitsu-u-chan. When Tatsuya left the Land of Fields, he had proactively signed a summoning contract with it. This way, the ninja cat Kitsu-u-chan became a messenger for Tatsuya and Pakura to relay messages remotely. However, this was the first time in a long time that Tatsuya had summoned it.
"Kitsu-u-chan, take this to Pakura," Tatsuya said, pulling out a scroll from his pocket and tossing it to the ninja cat.
"Don't worry! It will be delivered safely!" Kitsu-u-chan leaped up, caught the scroll in its mouth, and with a final reply, dispelled the summoning technique, disappearing from the spot.
The scroll contained several lists of materials to be purchased, most of which were instruments needed to establish the laboratory. Tatsuya couldn't easily leave Konoha, so he had to rely on Pakura to make the purchases outside the village.
As night deepened, in the Root base deep beneath Konoha Village, inside a massive laboratory, a boy of fourteen or fifteen lay quietly in a large cultivation tank. The boy's eyes were tightly closed, his body connected to several tubes, a pained expression on his face. A special, pale green nutrient solution in the tank was being rapidly absorbed by the boy.
Beside the tank, Danzo, surrounded by several Root ninjas, stared intently at the boy inside.
Half an hour later, all the nutrient solution in the tank had turned into a pure white, transparent liquid.
The boy slowly opened his eyes!
Looking at the boy in the tank, Danzo's eyes flashed with a shè terrifying light.
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