A week passed, and after a week of training, the growth of Tanjirou and the others was visible to the naked eye.
Every day, they gained valuable experience from their sparring with Kyojuro Rengoku, which they then applied to themselves.
Gradually, even Agatsuma Zenitsu no longer complained about the strenuous training, diligently trying to keep up with Tanjirou and Inosuke.
Although he was prone to laziness and not good at working hard, he knew that if he continued like this, he would hold them back.
His companions were all working hard; he couldn't just be idle on his own.
He needed to push himself harder.
He wanted to make his grandfather look at him with new eyes.
When his grandfather saw his changed self, he would surely praise him.
"Mmm! I have seen your growth!"
"But do not be complacent!"
"This is still far from enough!"
After finishing dinner, the four sat in the courtyard, meditating and resting.
Through meditation, one could maintain calm thinking; in battle, absolute calmness was paramount.
Once swayed by emotions, while it might unleash potential, for the vast majority of people, it would expose their weaknesses.
This would allow enemies to seize opportunities, leading to their demise.
Through their time together these past few days, Tanjirou clearly recognized that Mr. Rengoku was a very caring person.
Although he was strict during training, Tanjirou knew it was for their own good.
Mr. Rengoku knew a lot, and the upright and awe-inspiring aura that emanated from him made people feel very at ease.
Every action was that of a strong person's boldness, yet he was also gentle in his demeanor.
He was an easy person to get along with.
When the meditation ended, Tanjirou looked at Kyojuro Rengoku curiously and asked,
"Mr. Rengoku, was your swordsmanship taught to you by your father?"
Tanjirou had learned from Kanzaki Aoi that the disheveled person from that day was actually the former Flame Pillar!
It was a bit unbelievable, but he had to accept the facts.
After all, he was the father of such a powerful Mr. Rengoku.
He must have been a strong person as well.
"Yes, our family has been inheritors of Flame Breathing for generations."
"I received my father's teachings since I was young."
"Later… after my mother passed away, my father became disheartened, and I could only study the three Flame Breathing guidebooks myself to strengthen my breathing technique."
Kyojuro Rengoku's expression was normal as he recounted his past, briefly mentioning his past efforts.
Self-taught breathing technique?
Mr. Rengoku was indeed a very impressive person.
Tanjirou's crimson eyes reflected Kyoujurou's fiery red hair.
A brilliant and scorching presence like a flame; could he also become such a person?
"Thud…" Inosuke and Zenitsu, who had fallen asleep during meditation, tumbled onto the ground haphazardly.
Tanjirou smiled and looked at Kyoujurou.
"Mr. Rengoku, I'll take them back to their room now."
"Mmm, get some good rest."
"You've also worked hard today! Please get some good rest too!"
Flame Breathing is suitable for those with a fiery heart and an outgoing personality, but Young Kamado and the others are not suited for it.
They have all mastered their own breathing techniques.
Even so, Kyojuro Rengoku was still willing to teach them as his Tsuguko, not for any other reason, but at least he hoped these young people could put their knowledge to good use.
And survive in battle!
"It's nighttime." As per their agreement, he should go find Yoizumi.
Going to the backyard, he saw Yoizumi already standing there.
He had changed into the clothes mended by Kanzaki Aoi, making his posture appear tall and straight, with his white-gold nichirin blade hanging at his waist.
"You're here." The clear sapphire eyes looked at Kyojuro Rengoku.
"Mmm! Then first, let me see your sword swings."
Yoizumi drew his nichirin blade and swung it in his usual manner; the sharp blade instantly sliced the practice wooden stake into several pieces.
Kyojuro Rengoku stared intently at Yoizumi's movements and quickly identified the problem.
Without systematic practice, Yoizumi's sword movements were always unpredictable, which had both advantages and disadvantages.
The range of his swings was too wide, but Yoizumi's swinging speed compensated for this gap.
If he corrected it, he could be even faster!
If the wooden stake was treated as a demon, Yoizumi's sword always aimed for the demon's neck, which was correct, but demons wouldn't meekly allow you to approach their heads.
Focusing on only one target was not enough, unless there was absolute confidence in achieving a one-hit kill.
Kyojuro Rengoku explained these shortcomings to Yoizumi, who thought for a while.
His learning ability was not weak; in just a moment, he corrected himself.
This lesson did not last too long.
Yoizumi didn't have many problems, but they needed to be changed subtly, not rushed.
"If you need anything else from me, just come find me!"
Kyojuro Rengoku was very fond of Yoizumi.
Although he had a cold personality and didn't talk much, he always responded to his words.
"Thank you." Yoizumi nodded slightly and began training again.
His Breath of Snow currently only had two forms, which was far from enough.
If he had a few more sword techniques when facing Upper Moon Three, perhaps he wouldn't have been so disheveled.
Is it not okay to focus on only one target... Then I will expand the target!
Yoizumi imagined the general scene in his mind.
After a while, a glimmer of light flashed in his blue eyes.
Feasible!
He bent his body, his calves slightly flexed.
While rapidly swinging his nichirin blade, he lunged forward.
The frosty white blade aura overflowing from the nichirin blade resembled thousands of pure white flying feathers, dancing gracefully and ethereal, yet harboring murderous intent.
Each feather was incredibly sharp, landing on the wooden stake and forming a thin layer of ice on it.
Countless flying feathers fell, and the wooden stake turned into dust.
"Clang." He cleanly sheathed his nichirin blade; the Third Form was complete.
What name should I give it... White Feather, Snow, these words were ground on his lips.
Yoizumi slowly said,
"Snow Breathing Third Form: Thousand Feathered Crane Snow."
He just didn't know what effect it would have on a demon.
He would try it when Tanjirou went on a mission.
Hmm... Looking at the originally clean ground, which still had some green plants, they were no longer there due to the Third Form just now.
The ground was also covered with some thin ice, uneven and pitted.
Next time, it's better not to easily test it in the Butterfly Mansion.
Yoizumi looked for some remedial measures and found a small shovel in a corner not far away, which should be used for loosening soil.
He picked up the shovel and squatted on the ground, repairing the ground.
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