He felt a surge of memories flooding his mind, the result of years spent day and night meticulously refining his Chakra Refinement Technique.
[Akimichi Clan Chakra Refinement Technique (Proficient) -> (Expert)] [Expert Effect: Active at all times, no energy expenditure required to maintain, runs automatically at 90% capacity.]
He felt the energy circulating within his body, eventually converging into a warm current that flowed through his meridians, coalescing into a different form of energy.
His chakra began to recover slowly, at a rate more than fifty percent faster than before.
Chakra is not an energy that can be stored; ninjas can only extract it through the Chakra Refinement Technique. To a large extent, the amount of chakra one can extract in an instant determines a ninja's upper limit.
If physical strength and mental energy relate to the total volume of chakra, determining how much water is in the pool, then the Chakra Refinement Technique determines the diameter of the pool's outlet.
After all, those who know, know: length isn't the key; diameter is the truth.
Throughout the ninja world, only the Yin Seal can store chakra, allowing the user to unleash doubled power during combat.
Otherwise, there are only the Jinchuriki of the Tailed Beasts. But that, after all, is not one's own power.
Therefore, it is no exaggeration to say that one of the keys to a ninja's combat prowess lies in their Chakra Refinement Technique.
Denji felt this was not yet the limit.
Then, continue: practice the Chakra Refinement Technique!
This time, the memories felt even more arduous and unique than the ones before.
In these memories, he was no longer practicing alone; it was as if a tall, red-haired man was carefully teaching him how this ninjutsu was developed, how it was conceived, what the key difficulties were, and what specific techniques were required.
Denji understood.
A flash of insight struck him: the tall, red-haired man in his memories must be the founder of this ninjutsu, the First Akimichi Clan Head.
[Chakra Refinement Technique (Expert) -> (Grandmaster)] [Effect: Refinement speed increased by 2x, 100% automatic operation, Akimichi Clan Ninjutsu compatibility +100%, Chakra capacity +20%]
Denji nodded in satisfaction, yet he vaguely felt that Grandmaster level was not the end of this technique.
More precisely, the limit of how this technique was first developed was the Grandmaster level.
Even if the First Akimichi Clan Head himself were here, he could not have done better; at most, he would be on par.
But that was only the limit of others.
It was not the limit of this ninjutsu. This refinement technique had not yet reached its end...
Although the path ahead was obscured and difficult to navigate—a path where ordinary ninjas might spend decades without making an inch of progress—Akimichi Denji was no ordinary man. Since it was not yet the end...
His heart suddenly pounded; the path ahead, unfinished...
Glancing at his only remaining Wish Point, Denji did not hesitate. With a thought, he made his move.
Deep Blue, add points!
It had to be done!
Even if having only one Wish Point might mean wasting early-stage resources, he had reached this point—how could he resist the urge to glimpse the scenery further down the road?
Akimichi Denji was a man possessed of wild instincts. Otherwise, in his past life, he would never have attempted to use the Nine Dragon Power while bodybuilding.
To become stronger, Akimichi Denji could stake everything he had.
This time, the cultivation memories were different from all the others. In the memory, he had reached the pinnacle of the technique, yet could not advance further. He felt in his heart that this was the limit, but he refused to give up. For one year, two years, ten years, he did only one thing: he continuously cycled the ninjutsu, constantly refined chakra, then dissipated it, used it, and observed the circulation of the chakra.
His face aged day by day, and his muscles even began to atrophy!!
Finally, on a cool night, as the elderly Denji felt the breeze, it suddenly occurred to him that chakra possesses nature. The simplest chakra refinement had reached its limit, but what about chakra with nature? Could chakra be fused together from the very beginning?
He attempted to fuse the chakra attributes he already possessed.
The shackles that had trapped Denji for decades finally began to loosen.
A transformation occurred.
[Akimichi Clan Chakra Refinement Technique (Grandmaster) -> (Transcendental)] Effect: Awaken Kekkei Genkai based on chakra attributes.
A simple sentence, yet it struck Denji like a thunderbolt, stirring up turbulent waves in his heart.
As everyone knows, in the ninja world, Kekkei Genkai is an innate "privilege."
It cannot be obtained through hard work. You can train day and night, you can fight to the death, you can train your taijutsu to the level of the Eight Inner Gates—but a Kekkei Genkai is something carved into your genes; if you are born with it, you have it; if not, you don't.
For a ninja with a Kekkei Genkai, their starting point is the end point for an ordinary ninja.
This is the damn world of bloodline theory.
Look at the apex of the ninja world: the Sharingan, the Byakugan, Wood Release, the Rinnegan—which one of them is not a Kekkei Genkai?
Naruto and Sasuke are even direct reincarnations of Asura and Indra.
The entire world of Naruto is also known as Legend of the Eyes: Five Village Melee.
Even if the ability awakened isn't a dojutsu, it is still a Kekkei Genkai!
A mere common Kekkei Genkai is enough to establish a massive ninja clan in any hidden village.
Even the Ino-Shika-Cho trio does not possess a Kekkei Genkai.
They only managed to rank among the ninja clans of Konoha by relying on the coordination of their three secret techniques.
But among those who possess Kekkei Genkai—the Hyuga, the Uchiha, the Kurama—who among them ever needed to form an alliance?
This is the level of importance a Kekkei Genkai holds!
And now, through the most basic chakra refinement technique, one can obtain such a Kekkei Genkai through their own hard work and sweat.
It is the ticket to what is called a "Kekkei Genkai," something countless ninjas spend their entire lives unable to touch.
Akimichi Denji reached out his hands.
In his left hand, Fire Release chakra—scorching, restless, like a wild beast trapped in a cage, roaring to break free.
In his right hand, Wind Release chakra—sharp, violent, like an invisible blade spinning at high speed in his palm.
Two completely different forces roared in their respective palms.
Denji took a deep breath.
And then—
He clapped his hands together.
"Bang—"
A muffled sound; it was not an explosion, but the low growl of two forces merging together. Between his hands, a red light ignited, like magma surging through a fissure, or charcoal in a blacksmith's furnace stoked by a bellows.
A layer of crimson radiance was spreading over his hands.
It was not fire—fire is leaping and restless.
This light was "adhering."
It was like molten lava wrapping around his fists, like molten iron casting his arms.
The crimson light flowed over his skin, baking the air until it twisted and warped, emitting a faint "hissing" sound.
That was the Kekkei Genkai formed by the fusion of wind and fire.
It is common knowledge in the ninja world that the fusion of two chakra natures can form a Kekkei Genkai.
The fusion of wind and fire, as shown in the original work, is Scorch Release.
In the original work, it was an ability possessed solely by Pakura of Sunagakure, capable of instantly evaporating the moisture within an opponent's body by manifesting fireballs—a truly broken ability.