The Kamado family, who made their living selling charcoal, had passed down a ritual dance called "Hinokami Kagura" through the generations.
To this day, the descendants of the Kamado family had long forgotten the original origin of this dance, yet for some reason, its transmission had never been interrupted.
Every male of the Kamado family, from the moment they could remember, had to diligently practice Hinokami Kagura daily—not only the dance movements, but also the accompanying peculiar and intricate breathing rhythm.
And among all the descendants of the Kamado family throughout history, Kamado Tanjuro was undoubtedly the most special one.
Unlike his grandfather and father who had already passed away, Kamado Tanjuro had mastered all the forms of Hinokami Kagura at a very young age.
Each time during the ritual dance, only he could dance for an entire night, as if his body contained endless stamina.
Not only that, but at the age of twelve during the ritual ceremony, Kamado Tanjuro suddenly gained the ability to "see."
Blood, muscles, bones, internal organs... everything within his own body, including everything within his father's body beside him—Kamado Tanjuro could "see" it all.
It was as if the entire world had suddenly become transparent.
All along, Kamado Tanjuro had believed that he was the only one in this world who had accomplished this.
Until tonight, with the sudden arrival of Mitsuba and Shinjuro, he had finally encountered a second human who had stepped into that transparent world like himself.
"I see. The **Hinokami Kagura** you speak of should be my clan's Sun Breathing.
It is not a ritual dance, but rather a unique breathing technique integrated with swordsmanship.
Mr. Kamado, the reason you were also able to reach that transparent world—
I believe that aside from your inherent considerable talent for swordsmanship, the more important factor should be the result of your repeated practice of Sun Breathing over these years..."
After listening to Kamado Tanjuro's account, Mitsuba completely understood everything.
"If my guess is correct, it should have been several hundred years ago when an ancestor of my clan unintentionally passed down this breathing technique to an ancestor of your Kamado family.
This is what allowed it to be passed down through your family generation after generation in the form of a ritual dance.
That such a coincidence could occur in this world is truly astonishing..."
Mitsuba's memory had always been excellent.
The moment she finished hearing the Kamado family's story, she immediately recalled those several causal threads she had seen on her brother Yoriichi hundreds of years ago—
[On a certain year, month, and day, intending to return to the old residence to pay respects at Uta's grave, but unexpectedly discovering that the house had been occupied by a young couple. The husband called himself Kamado Sumiyoshi, ordinary and unremarkable, warm and kind.]
[On a certain year, month, and day, the small mountain village was massacred by demons. While wandering aimlessly, unintentionally returned to the old residence once more. Under Sumiyoshi's warm invitation, decided to stay here for a period of time.]
[During this period, Sumiyoshi's little daughter always loved to pester me to perform sword techniques for her. Seriously performed for her several times. Each time I demonstrated, Sumiyoshi would always sit nearby watching attentively.]
[Lamenting that my remaining days were few, after conversing with Sumiyoshi, resolved to leave and continue devoting myself to searching for Kibutsuji Muzan's traces.]
Mitsuba never could have imagined that hidden within these seemingly ordinary causal threads that she had subconsciously ignored back then, there actually lay the transmission of Sun Breathing?!
Incredible—just what kind of extraordinary man was this Kamado Sumiyoshi?
Clearly possessing no foundation in swordsmanship whatsoever, yet able to perfectly memorize all the forms of Sun Breathing through just a few observations?!
What was even more unbelievable to demons was that this Kamado Sumiyoshi's descendants could actually generation after generation, without the slightest deviation, continue to pass down such a difficult-to-master Sun Breathing to this very day?!
Lord God, you're cheating far too obviously, aren't you?
Perhaps some might think this was merely a coincidence—a great coincidence composed of many small coincidences.
But as the "Demon of Causality," Mitsuba didn't believe such nonsense one bit.
In this world, there were absolutely no coincidences.
All seemingly coincidental things that happened to humans were inevitabilities arranged by the gods and guided by causality!
All of them!
Including how her brother Yoriichi unintentionally passed down Sun Breathing to Kamado Sumiyoshi before his death!
Several hundred years ago, when that small mountain village was destroyed, the high and mighty gods had perhaps already detected the "defiance" that Yoriichi would commit in the future.
Thus, while Yoriichi was grief-stricken by the destruction of the small mountain village, they deliberately guided Yoriichi to return to this mountain.
And in a way that even Yoriichi himself was unaware of, caused him to unintentionally pass down the forms of Sun Breathing to the Kamado Sumiyoshi of that time.
Through this method, they preserved the transmission of Sun Breathing.
This was a contingency plan left by the gods.
But it shouldn't be limited to just this.
Because Sun Breathing alone was utterly meaningless.
There must be an even greater secret hidden within this Kamado family.
"..."
In the latter half of the early morning hours, wind and snow once again swept through the mountains.
With the sound of a faint shamisen, Mitsuba's main body left the Infinity Castle and appeared in this deep mountain.
Her figure shuttling rapidly through the mountain forest, in merely an instant, her form descended before that small wooden cabin.
With the enhancement of the Transparent World, her entire aura concealed, Mitsuba silently entered the cabin and walked into the Kamado couple's room.
At this time, this young couple had both fallen into deep sleep, completely unaware of Mitsuba's sudden arrival.
The whites of her eyes completely blood-red, her pupils transforming into mandala flower shapes, Mitsuba instantly saw through all the causal threads of past and future upon this couple.
[As expected.]
Seeing those most particular causal threads at a single glance, the corners of Mitsuba's mouth slightly rose.
[Four years later, gives birth to eldest son Kamado Tanjiro with wife Kamado Kie.]
[Fourteen years later, carefully instructs Kamado Tanjiro, helping him thoroughly master all the movements of Hinokami Kagura.]
[Nineteen years later, before passing away, passes on the principles of opening the Transparent World to Kamado Tanjiro.]
Mitsuba's Blood Demon Art granted her the ability to thoroughly see through all causality upon a person.
This naturally included that person's future.
In the life arranged for Kamado Tanjuro by the gods, he and his wife would have six children in the future—four sons and two daughters.
Among these, the causal threads of his latter five children were all thin, no different from the causal threads on ordinary people, easily torn apart.
Only that causal thread representing the birth of his eldest son named "Kamado Tanjiro" was as thick as an adult's arm!
Incredible...
The last time Mitsuba had seen such astonishing causal threads was hundreds of years ago on her brother Yoriichi.
Not only his birth, but also mastering Hinokami Kagura, and remembering the principles of the Transparent World, and so on...
On Kamado Tanjuro's body, any important causality related to this eldest son of his was all like this!
This meant that as long as Kamado Tanjuro didn't die prematurely, four years later, he would certainly have a child named Kamado Tanjiro with his wife.
Moreover, before his death from illness, he would definitely pass down the Sun Breathing that the Kamado family had inherited for hundreds of years, as well as the principles of the Transparent World that he himself had comprehended, entirely to this child!
This child named Kamado Tanjiro was destined to be born.
So the question was, what exactly did our Lord God create such a child for?
Gradually forming a hypothesis in her heart, Mitsuba immediately moved her footsteps and went to the room where Shinjuro was.
On the soundly sleeping Shinjuro, Mitsuba similarly saw two thickened causal threads.
[One year later, gives birth to eldest son Rengoku Kyojuro with wife Rengoku Ruka.]
[Eighteen years later, hears that Rengoku Kyojuro has been promoted as the new Flame Hashira.]
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This story has ended in chapter 315, you can read on patreon.com/dzeref887 for faster access or wait until August to read on WebNovel until the story ends.