On June 20th, Year 32 of Konoha, seventeen Kumo emissaries dressed in long white robes proudly stepped into the Hidden Leaf Village.
"Welcome! You've come a long way. How about resting for a while first?" The Third Hokage warmly greeted them, leading a group of high-ranking officials.
Ji, the leader from Kumogakure and also a clansman of the Third Raikage, politely responded with a gentle expression, "Thank you! Konoha remains as hospitable as always!"
"Of course," the Third Hokage replied, before guiding them together with other leaders toward the center of Konoha, to that luxurious hotel built last year.
The group chatted happily along the way, completely unaware of a shadow hiding beneath the ground.
"They don't seem like typical ninja, but would Kumogakure really send ordinary people here?" After analyzing the details, he transformed into a puff of white smoke and vanished underground.
At the Uchiha Kendo Academy, Shen suddenly frowned while cutting down his fiftieth clan member.
"They arrived at Konoha in just over ten days? Looks like Kumogakure must be in quite a rush."
Traveling on foot across more than 3,000 kilometers from the Land of Lightning to the Land of Fire was definitely beyond what any ordinary person could endure.
"I didn't even need to check — they're obviously all ninjas. Kumogakure could at least try to look more convincing next time."
He thought, "There's no way the Konoha elders could've missed such obvious signs."
"Rest time's over! On your feet — keep going!" Shen drew the Chakra Channeling Blade, planning to personally investigate later that night after training.
The fifty exhausted Uchiha clan members could only reluctantly get up and resume their attacking stances.
Inside the nearly hundred-meter-tall Konoha Grand Hotel—funded jointly by various clans.
After entering Room 2046, the Kumo envoys quickly began inspecting every piece of furniture and decoration inside.
The entire room had a very minimalist design: gray walls accented with hints of red, large wall-mounted TVs embedded in the walls, four or five black sofas, and a big bar counter formed a nearly hundred-square-meter living area.
In addition, there were six triple rooms, each no smaller than the living room, similarly arranged.
"Ji, nothing unusual detected."
"Good. Finally, we can take off these damn clothes." Ji said while sitting on the sofa, then yanked off his white robe.
Wearing this outfit in weather like this was pure torture.
"Ji, come check this out!"
At his subordinate's words, Ji turned his head in the direction the man was pointing.
"What is it?"
"It looks like a machine that releases cool air — should be what our intel mentioned: an air conditioner." As the subordinate explained, he pressed the power button on the remote control.
With a beep, the wall-mounted AC unit kicked in, releasing a stream of cool air into the living room.
Instantly, a chill surged onto Ji's forehead. He sighed in relief, "How comfortable."
"Never thought Konoha actually possessed such advanced technology."
"Yeah. We've only recently electrified our whole village, yet they're already enjoying this kind of luxury."
"Looks like the reports weren't exaggerating. Konoha really is about ten years ahead of us after all."
Ji listened to his subordinates' discussion and began comparing the technologies of both sides.
As a future technological powerhouse, Kumogakure naturally possessed numerous high-tech advancements.
However, energy significantly constrained their rapid development.
Electricity was first discovered and utilized by Kumogakure.
True to its name, the Land of Lightning was indeed a country frequently struck by thunderstorms.
Long ago, people living here discovered that lightning could serve as an efficient energy source.
Yet due to constant warfare in the shinobi world, they never had sufficient time to develop methods for storing electricity.
It wasn't until after the First Great Ninja World War ended over a decade ago that Kumogakure Village, newly established not long before, took advantage of the peaceful period to invent batteries capable of storing electrical energy.
The ability to store electricity meant they could also utilize it, so simple machines like electric lights and fans emerged accordingly.
Years of research into electricity eventually helped them solve the fundamental issue of collecting electrical power through wind and thermal power generation several years prior.
Nowadays, the entire Kumogakure village had access to electricity, with every household enjoying electric fans while eating watermelons on hot summer days.
But what about Konoha? They gave you direct cooling!
The chemical and physical knowledge involved in this went far beyond what could be thoroughly researched within just a few decades.
"This 'air conditioner'—how exactly does it produce cold air?" Ji couldn't figure it out no matter how much he pondered.
The reason Raikage assigned him as team leader wasn't only because of his sufficient strength but also because he himself was a researcher.
Konoha's "air conditioner" clearly didn't run on electricity!
Firstly, there were none of those large batteries commonly seen back home. Secondly, there were no wires spreading throughout the village either. No matter how one looked at it, this wasn't electricity transforming into heat energy then achieving continuous cooling through material sublimation.
Kumogakure had already laid down the basic theory, though key formulas were still missing.
Ji stood up and carefully removed the air conditioner from the wall, beginning to examine its internal structure.
"There's an iron block inside that continuously produces cold?" He even discovered he couldn't decipher this device at all.
"There's chakra fluctuation. Could it possibly use Nature Transformation to create cold?"
As a scientific researcher, Ji naturally understood that this task wasn't simple—it wasn't easy either.
Chakra contained five elemental attributes that counteracted each other. Mixing them in correct proportions wasn't difficult, but insulating materials posed a serious challenge.
Both aspects were indispensable!
Don't know the right ratio? Then go find insulation! Can't find good insulation? Then calculate the ratio first!
"Konoha's tech really is a solid ten years ahead of ours." Ji couldn't deny this undeniable fact.
Moreover, he personally believed Konoha's solution of using chakra as its power source surpassed Kumogakure's efficiency by quite a margin.
In the world of ninjas, chakra was understood as energy formed from spiritual and physical components—effectively an endless resource.
As long as it wasn't overharvested from human bodies, it was practically cost-free.
"Now I see why the Uzumaki clan all came here," Ji finally understood why Konoha had opted to shelter the Uzumaki clan.
Unfortunately, this was just his imagination running wild.
Right now, the Uzumaki clan really was working off their debts using their own chakra—but only to a small extent.
A certain 'human calculator' had already begun developing solar and chemical energy sources.
He had preserved the fundamental theories and related formulas from his past life. Starting research from scratch was absolutely no problem for him.
Originally in his plan, chakra was just a form of biological energy destined to be discarded.
Setting aside exploitation concerns, the cost of core containers required just to store chakra was quite high—making mass production impossible within the Naruto world.
Using Tailed Beasts instead? There's always the risk they might get stolen one day!
Only the Land of Fire, where the Daimyo is both generous and wealthy, could afford these products priced twenty times higher, boldly claiming they'd promote them nationwide.
One wealthy capitalist laughed out loud, imagining how he'd rake in another fortune from the Land of Fire once solar and chemical energies were developed.
Using money earned from others to fund his research, then selling the results for sky-high prices—the Daimyo of the Land of Fire was simply too kind-hearted!
"We must immediately begin chakra development work once we return to Kumogakure," Ji, falling for a flawed line of thought, believed that his country must abandon electric power and embrace zero-cost chakra.
Today, Shen Uchiha successfully entered outer space.
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