(Extra chapter)
It's true we haven't reached, and aren't even close to, 300, but because I'm busy later, I'll publish the chapter in advance, so I hope we reach it, otherwise it will be pointless...
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In Kiyokawa Izumi's opinion, the Nine Hashira were simply superhumans.
This idea became even firmer after he got the gourd.
As a Transmigrator, he naturally knew about the concept of "Total Concentration Breathing: Constant."
He also roughly remembered how to train.
Since he had made up his mind, he wouldn't just think about it without acting.
Intense exercise was clearly out of the question while his injuries hadn't healed.
So, he could only ask The Three Little Ones to help him get a gourd.
When two gourds, each the size of a fist, appeared before him, Kiyokawa Izumi confidently took them.
He thought he should be able to blow up such small gourds—after all, he was a man who had created his own Breathing Technique and pushed it to LV2. Shouldn't a small gourd be easy to handle?
But reality was cruel.
Even though his face was flushed, he couldn't blow up the gourd.
The Three Little Ones stood by his bed, watching with wide eyes.
Kiyokawa Izumi didn't feel embarrassed; this body's attributes in all aspects were not outstanding, the only commendable thing was its solid foundation.
"He didn't blow it up..."
"Kanao-nee-chan can already blow up a gourd this big."
The Three Little Ones whispered to each other, and one of them couldn't help but gesture.
"..."
'Blowing the gourd is the core training method for mastering Total Concentration Breathing: Constant. The general principle should be to strengthen lung capacity, increase oxygen intake, activate the body's potential more efficiently, accelerate blood circulation, and significantly improve physical fitness.'
'But isn't blowing up the gourd a bit too exaggerated?'
'Are the Nine Hashira even human?'
The lung capacity of an ordinary person is usually between 3500-4000 milliliters.
Athletes can reach about 6000-7000.
The world record in his previous life was 15000 milliliters.
Kiyokawa Izumi felt that his lung capacity should have reached the level of an excellent athlete—but even so, it wasn't enough to blow up the gourd.
Not to mention the large gourd that was almost as tall as The Three Little Ones.
Recalling Tanjirou's training, after strenuous effort, he could blow up a small gourd in one breath.
At that time, his lung capacity must have been three times that of an ordinary person, right?
He was simply a monster!
No wonder these Pillars could fight the Upper Ranks; their physical fitness had probably long surpassed physiological limits.
"Leave this gourd with me for now."
Kiyokawa Izumi said with a smile to The Three Little Ones, not backing down because he found it difficult.
How would he know if he didn't try?
"Mhm!"
"No problem!"
The Three Little Ones nodded repeatedly.
Can't tell them apart!
Really can't tell them apart!
These three little ones looked almost identical and wore the same clothes. Kiyokawa Izumi had face blindness and truly couldn't distinguish who was who.
Scratching his head, Kiyokawa Izumi, with a serious attitude, asked earnestly.
"Are you Terauchi Kiy (Kiy-chan)?"
The little one on the right had pigtails and wore a light blue bow.
All three shook their heads repeatedly.
"Naho-chan (Takada Naho)?"
Another shake of the head.
"..."
With three choices, Kiyokawa Izumi guessed twice in a row and was still wrong.
This wasn't his fault.
Because he hadn't paid much attention to these things before.
About five minutes later, he roughly distinguished them.
His memorization method was also very simple—the one with the pink bow was Terauchi Kiy (Kiy-chan), the one with the light blue bow was Nakahara Sumi (Sumi-chan), and Takada Naho (Naho-chan) wore a light green bow.
With effort, he finally remembered them.
"How about this?"
The little ones took off their bows, circled his bed, and then stood in a row again, staring at him with their beady eyes.
"Huh?"
Without the bows to help him remember, Kiyokawa Izumi's mouth twitched slightly, and he could only start guessing blindly.
"Kiy-chan?"
They shook their heads.
"Sumi-chan... no, is it Naho-chan?"
Kiyokawa Izumi almost wanted to activate his Sharingan to help him remember.
After playing with these little ones for a while, Kiyokawa Izumi looked at the gourd by his bed. Having nothing else to do, he could only continue blowing the gourd.
Blow and blow!
The gourd showed no reaction at all!
Kiyokawa Izumi was unwilling to blow it in segments—segmenting his breaths and blowing multiple times would indeed reduce the difficulty significantly, but this method was a bit of a shortcut.
In actual combat, when an explosion of power was needed, demons wouldn't give him time to breathe in segments.
When his lungs felt distinctly uncomfortable, Kiyokawa Izumi put down the gourd; he knew the principle of too much of a good thing.
Breathing Technique training was different from swordsmanship; there were no shortcuts—swordsmanship techniques could be quickly learned with those eyes.
But lung capacity, if it wasn't there, it simply wasn't there.
Recalling memories from his previous life, he hadn't heard of any methods to quickly increase lung capacity.
Perhaps because he was too bored, Kiyokawa Izumi had already started thinking about whether he should change his name.
'System, I am now Uchiha , and I am the only member of the Uchiha Clan in this world.'
'So, it's perfectly reasonable for me to be the Clan Chief, right?'
'Does this count as completing a comeback?'
Anyway, the idiot system wasn't very smart, so he might as well consider if he could trick it into giving him some rewards.
If he could upgrade his Abridged version Sharingan, tsk, even without Chakra, it would still be a bug-level ability in this world, wouldn't it?