When Second Hokage's forbidden art manuscript was turned to the last page by Rinto, his attention finally stopped at the corner of the manuscript, on a few lines of scrawled, unfinished deduction formulas. That was Second Hokage's idea that was not implemented at the time - the sustainable energy supply model of the enchantment, ultimately only stayed in the theoretical draft stage due to the adaptability problem between Natural Energy and enchantment Chakra.
These few lines of words just hit the hidden trouble that Rinto is most concerned about at the moment.
The village protection barrier and the secondary configuration of the core area that he had previously optimized, even if the energy consumption has been pushed to the extreme, are essentially "stock consumption" logic: either rely on ninjas to inject Chakra in shifts to maintain, or rely on the sealed Chakra crystal for energy. The former is in During wartime, the already tense medical and combat ninja manpower will be occupied. Once the front line is tight and the energy supply of the barrier is interrupted, there will be a gap in the entire village's defense; no matter how large the latter's reserves are, they will be exhausted one day and need to be replaced and replenished regularly. Someone will inevitably knock on his door and disturb his experimental rhythm.
Even the independent barrier in his own laboratory, although it has an energy closed loop, still suffers from minimal energy loss in long-term operation. Every two or three months, he needs to manually replenish Chakra and calibrate the energy balance. For Rinto, who pursues ultimate efficiency and hates all unnecessary interruptions, this is still a redundant trouble.
He put down the manuscript, traced his fingertips across the blank slate, and began to build a new theoretical model. What he wanted to do was never an optimization that addressed the symptoms rather than the root cause of "reducing energy consumption", but a completely closed-loop self-circulation energy system - to achieve the goal of permanent and stable operation without the need for artificial energy supply or regular maintenance.
The core logic of this system is divided into two mutually supporting modules, which are completely based on the two major research results he has accumulated previously: one is the precise control of Natural Energy in the Senjutsu system, and the other is the energy recovery and reuse technology in the Chakra configuration.
The first module is the spontaneous absorption and stable transformation of environmental energy.
The core reason why traditional enchantments cannot be sustainable is that there is no stable source of energy replenishment. What Rinto needs to do is to absorb the logic of Natural Energy in Senjutsu, simplify and solidify it into the enchantment pattern, so that the enchantment can be spontaneous and sustainable. Continuously absorbs the free Natural Energy in the air and the scattered Chakra that escapes in the environment, and then accurately and stably converts it into the standard Chakra required for barrier operation through the preset conversion configuration, achieving "incremental supplement" of energy.
This is also the core problem that Second Hokage failed to solve back then: Natural Energy is extremely difficult to control. A slight imbalance will cause the barrier pattern to petrify and disintegrate, let alone long-term and stable automatic transformation. But for Rinto, which has already understood the Senjutsu fusion logic and can accurately control Natural Energy to the level of a single cell. For one thing, this problem was easily solved. He simplified and reconstructed the "dynamic balance anchor point" in his Senjutsu system, made it into a very small solidified configuration, and embedded it in the energy conversion module. Even if the Natural Energy concentration in the environment fluctuates, it can automatically adjust the absorption and conversion rate, and always maintain stable and safe output.
The second module is full-link loss energy recovery and recycling.
The daily losses in the operation of the barrier and the large amounts of energy dissipated when dissolving attacks were all directly wasted before. Rinto has specially designed a set of recycling arrays that can recycle, purify, and re-inject all the energy dissipated in the entire link of the barrier, even extremely weak Chakra fluctuations, into the circulation system to achieve "stock reuse" and reduce unnecessary energy consumption to infinitely close to zero.
He even added a set of surplus energy storage mechanisms. In addition to maintaining the operation of the barrier, the Natural Energy absorbed daily will be automatically compressed and sealed in the core formation of the barrier to form an energy reserve pool. Once a large-scale attack or extreme impact occurs and the energy consumption of the barrier increases suddenly, the reserve pool will automatically release energy to cover the bottom, and there is no need for manual emergency replenishment.
After the theoretical model was built, Rinto did not directly modify the large barrier of Konoha. Instead, he first conducted a closed-loop test of the miniature model in the laboratory. This is his consistent scientific research habit, first completing the full process verification in a controllable environment, and then doing the landing adaptation to avoid any uncontrollable accidents.
In the first test, the problem was quickly exposed: the absorption rate of Natural Energy was sufficient, but the conversion efficiency was insufficient. The energy consumption of daily operation of the barrier was slightly higher than the energy supplemented by conversion. The cycle could not sustain itself. After 72 hours of simulation operation, the energy reserve dropped slightly.
Rinto did not pause, and immediately adjusted the node density of the transformation configuration, optimized the transformation paths of Natural Energy and Chakra, and increased the transformation efficiency from 62% to 98%, completely solving the problem of making ends meet.
In the second test, the conversion efficiency met the standard, but when encountering simulated Natural Energy concentration drop scenarios (such as rainy days and nights), the energy output of the barrier fluctuated slightly. Although it did not affect defense, it did not meet his requirements for "absolute stability." He then adjusted the adaptive logic of the anchor point configuration and added a dynamic replenishment triggering mechanism for the energy reserve pool. Even if the environmental energy is completely interrupted, the surplus energy in the reserve pool can support the barrier to operate at full power for more than three years.
In the third test, he focused on verifying the effect of the loss recovery module. He simulated continuous Ninjutsu impacts and Tailed Beast Bomb-level extreme blasts. While dissolving the attack, the barrier recovered more than 90% of the dissipated energy. Not only did there not be an energy deficit due to the high-intensity impact, but because the Chakra in the attack was recovered, the energy in the reserve pool increased slightly.
All three rounds of tests passed. The self-circulation system of the miniature model has perfectly achieved his preset goal: without any artificial energy supply, it can achieve permanent, stable, and fluctuation-free operation by relying entirely on environmental energy absorption and loss recovery, and can even reversely reserve energy during attacks.
Rinto did not hesitate at all, and first fully embedded this self-circulation system into the independent space barrier of his laboratory. He recalibrated the energy circulation path of the barrier, and perfectly integrated the four modules of absorption, transformation, recycling, and storage with the original four-layer defense structure. It did not affect the defense effect at all, but made the energy flow of the barrier smoother and more responsive.
After activating the entire system, he conducted real-time monitoring for 24 consecutive hours. The value on the energy measuring crystal was as stable as a straight line. Not only did the energy reserve of the barrier not decrease, but it actually increased slightly due to the continuous absorption of free energy in the environment.
He wrote the final conclusion on the record board: the self-circulation system operates stably, the energy closed loop is complete, there is no energy supply demand, and there is no maintenance demand, which is in line with expectations.
After solving the core needs of his laboratory, Rinto easily made adaptive self-circulation for Konoha's main village protection boundary, Hokage building, hospital, and Anbu headquarters' secondary boundary. Ring module. He did not change the previously finalized barrier structure, but made the self-circulation module into an independent formation eye that can be directly embedded. Even an ordinary ninja like Barrier Team can activate it directly by carving the module into the core formation eye according to the drawings, without having to reconstruct the original barrier at all.
He put the adapted drawings and parameters on the stone table at the entrance of the hospital - Sakura came to deliver case data the day before and said that he would come back to deliver new cases to the hospital today, so she asked her to bring them to Barrier Team along the way. That's fine, he has no intention of notifying Tsunade or Shikamaru specifically. For him, this is just a quick solution to a "hidden danger that may disturb him in the future", and it's not worth mentioning at all.
But he didn't expect that the shock brought by this system was far beyond his expectations.
Early the next morning, Konoha Barrier Team exploded. The ninjas who were responsible for injecting Chakra into the village protection barrier in shifts found out when they arrived at the post that the energy pool of the barrier was not only full, but even fuller than what they injected yesterday, even if they did not inject at all. Chakra, the operation of the barrier was as stable as a rock. Several old ninjas checked it over a dozen times, but could not find the problem, and their faces turned pale with fright - the village protection barrier is the first line of defense for Konoha. If such an abnormality suddenly occurs, no one can take responsibility if something goes wrong.
The news was reported all the way to the Hokage building. Tsunade immediately asked Shikamaru to take the captain of Barrier Team and go straight to Rinto's Laboratory. A few people stood outside the courtyard door, not even daring to take a breath. They knocked on the door cautiously, their tone full of anxiety. "Mr. Rinto, I'm sorry to bother you, there is an abnormality in the village protection barrier. We want to ask you..."
"It's not an abnormality." Rinto's voice came through the door, without any emotion, "A self-circulation module has been added to the barrier, so there is no need to arrange people to take turns to inject energy in the future."
The people outside the door were stunned for a moment, looking at each other with shock in their eyes.
A perpetual self-circulating barrier? This is completely unheard of in Shinobi World! The barrier energy supply problem that Hokage and countless barrier masters in the past have tried to solve was actually solved by Rinto? In the future, the village protection barrier will no longer need to occupy ninja manpower. Even if everyone is on the front line during war, the village's defense can still operate stably?
"Mr. Rinto, this... thank you so much!" The captain of Barrier Team's voice was shaking with excitement, and he bowed deeply to the courtyard door, "You have solved a problem that we have not solved for decades!"
Shikamaru also breathed a sigh of relief, and then gave a wry smile. He should have thought a long time ago that only Rinto can make such subversive changes. This gentleman is always like this, quietly solving major issues related to the safety of the entire Konoha, but he himself didn't take it seriously at all, and he didn't even bother to take the initiative to say it.
"I asked Sakura to bring you the drawings. There are maintenance specifications in them, just follow them." Rinto's voice was still calm, ignoring their gratitude and only made his only request, "The village protection barrier, as well as the barriers in the three core areas, daily energy change data, absorption conversion efficiency, and cycle status in different scenarios, are summarized once a week and sent to me in full."
"No problem! Absolutely no problem!" Shikamaru immediately agreed, "We will arrange for someone to record it, so that no trace is missed, and it will be delivered to you on time."
There was no response from the room, only the soft sound of the pen tip scratching across the paper was faintly heard through the door. A few people did not dare to disturb any more, and quickly and quietly retreated. The stone in their hearts completely fell to the ground. With this self-circulating system, Konoha's defense system directly solved the biggest shortcoming at the root.
And Rinto in the laboratory has already completely crossed out the matter of enchantment.
From the optimization of all nodes of the village protection barrier, to the independent space defense of the laboratory, to the secondary configuration of the core area, and finally to this sustainable self-circulating system, he has solved all the hidden dangers that may affect his research environment and interrupt his experimental rhythm once and for all.
He raised his hand to file and lock the slate that recorded the self-circulating data, and his eyes fell back on the stack of Mount Myōboku Senjutsu files on the corner of the table, as well as the rare medicinal material samples sent by the Nara Clan.
The hustle and bustle of preparations from the outside world, the gratitude and shock of Konoha, have nothing to do with him. He has cleared all obstacles and can finally devote himself to the next brand-new research topic without any interruption.