The upper reaches of the Naka River, the canyon chosen by Danzo, had now become a bustling, massive construction site.
Hundreds of ninja and craftsmen were busy here. The roar of Earth Release ninjutsu, the cracking of rocks, and the chants of workers echoed through the valley.
Shimura Danzo, the general manager of the Konoha Construction Team, stood at the highest point of the construction site with a dark face, like a supervising door god, scrutinizing every corner of the site.
Under his iron-fisted management, the entire construction site was like a tightly wound machine, quite efficient.
However, this infrastructure maniac encountered a problem today that gave him a huge headache.
"Lord Danzo."
An Earth Release ninja in charge of technology ran up to him, sweating profusely, holding a report, his voice filled with exhaustion. "We have tried seven different earth and stone structures, but... they all failed."
"What?"
Danzo's brow instantly knitted into a knot.
"The impact force of the water flow at this location in the Naka River Canyon far exceeds our estimates."
The ninja wiped his sweat and pointed to the experimental dam body not far away. "Even if we use Earth Release ninjutsu to reinforce the dam body, it probably won't be able to withstand the relentless impact of the water flow day and night. Depending on the seasonal changes in water volume, damage will appear in three to five years at most, or as short as half a month."
Danzo's face was gloomy.
He walked to the edge of the cliff and looked at the roaring river below, feeling as if he were looking at an enemy who was constantly mocking his incompetence.
He had poured all his heart and soul into this reservoir project.
What he wanted to build was not a jerry-built project, but an immortal monument that could stand for a thousand years and witness the prosperity of Konoha.
But now, just as the project started, he encountered the most fundamental problem—insufficient material strength.
In the evening, Hokage's Office.
Sarutobi Hiruzen had just finished processing an approval document for the new teaching materials of the Ninja Academy when he heard a knock on the door.
"Come in."
The door was pushed open, and Shimura Danzo and Uchiha Kagami walked in one after another.
Danzo's face bore undisguised fatigue and frustration. Even his signature blue work uniform was stained with mud spots, making him look a bit disheveled.
"Hiruzen," Danzo's voice was a little hoarse.
"Sit down," Sarutobi Hiruzen pointed to the sofa opposite him and poured tea for the two of them personally, a knowing smile on his face. "Looking at you, you've run into trouble?"
"Mm," Danzo didn't hide it. He wasn't the type to slap his face until it was swollen just to look fat.
He told Hiruzen about the problems encountered with the reservoir dam in detail.
"...Traditional earth and stone structures are not strong enough. I've tried every method, and they all failed," Danzo's tone was filled with frustration.
"Hiruzen, perhaps I thought about this too simply."
Uchiha Kagami added from the side, "Lord Hokage, the hydrological conditions of the Naka River Canyon are indeed very complex. With our current technology, it is extremely difficult to build a dam that will stand for a hundred or even a thousand years."
Sarutobi Hiruzen listened quietly without speaking.
He put down his teacup and looked at his close friend who was somewhat dejected due to the setback.
"Danzo, Kagami."
"Have you ever thought that earth and stone are fragile in themselves? But what if we recombine them in a special way?"
"Recombine?"
Danzo and Kagami were both stunned.
"That's right," Sarutobi Hiruzen took out a scroll he had prepared long ago, with a special formula written on it, from his drawer.
He slowly unrolled the scroll on the table.
"This is a concept I accidentally came up with while researching the nature transformation of Earth Release and Fire Release."
Sarutobi Hiruzen began his "Hokage's Little Class."
"Look, this formula requires several very common things. The clay under our feet, the river sand in the river, and the gravel on the mountain."
"But the most crucial is the fourth material," Sarutobi Hiruzen's pen pointed to an unfamiliar name on the formula.
"Black Stone Powder."
"What is this?" Danzo asked curiously.
"A mineral powder found in the eastern part of the Land of Fire. It is not hard in itself, but once mixed with water and then calcined at high temperatures, it produces a wonderful bonding effect."
"We can mix clay, river sand, gravel, and this black stone powder in a specific ratio, then add water and stir to form a slurry."
"Finally, and the most crucial step."
Sarutobi Hiruzen's gaze swept over Danzo and finally landed on Uchiha Kagami.
"Pour this slurry into the molds we have prepared beforehand. Then, use Fire Release ninjutsu to perform continuous, uniform high-temperature calcination."
"After it cools and solidifies, we will get a brand-new building material whose hardness far exceeds steel, yet can be shaped arbitrarily."
"I named it—"
"Chakra Concrete."
Chakra... concrete?
"Hiruzen... I..."
Danzo picked up the scroll, as if he could already see a magnificent dam poured from the material of "Chakra Concrete," spanning the Naka River and taming the galloping beast.
"Go."
Sarutobi Hiruzen smiled and patted his shoulder. "Go and create the village's immortal monument."
Danzo nodded and carefully put away the scroll as if it were a priceless treasure.
With this thing, the immortal monument would no longer be a dream.
Just as he was about to turn and leave, planning to arrange for people to mine black stone powder overnight.
Danzo's gaze fell on the last line of small print on the formula.
"Note: The calcination process requires precise flame output from a ninja who has mastered the Great Fireball Technique to achieve the best results."
Great Fireball Technique...
The name of a clan instantly surfaced in Danzo's mind.
His steps stopped. He turned around and looked at Uchiha Kagami beside him with burning eyes.
"Stare—d=====(￣▽￣*)b"
"(≖_≖ )?"
<><><><><>
Read Advanced Chapters on : patreon.com/Kaizo247
~ Every 150 PS = Bonus Chapter!
~ Push the Story forward with your [Power Stones]