To keep this world's course from deteriorating further, Tetsuya couldn't simply head straight to Muzan's lair and kill him.
Acting as a safeguard, he could only wait for Muzan and his demons to come to him.
It was already November 1916, and he remembered that Muzan had been completely destroyed in the early summer of the following year.
That would have been around June or July, which meant he still had to stay here for another seven or eight months.
He had to find something to do during that time.
So he planned to study Hinokami Kagura and Sun Breathing.
Ultimately, though, it was just a way to pass the time. If he really wanted to learn the original Sun Breathing, he could simply spend some money and get it from Husky.
Resurrecting Yoriichi Tsugikuni wasn't impossible, either, but doing so would disrupt this world's cycle of life and death.
This place wasn't like the Shinobi World, where coming back to life after dying couldn't have been easier.
In the Shinobi World, souls didn't reincarnate after people died. It was their chakra that went through the cycle of reincarnation.
For example, Indra's and Asura's chakra had kept reincarnating, entangling several generations of people.
But this world had no chakra, and souls seemed to reincarnate here.
At the end of the manga, when the story turned to Tanjiro and the others' descendants, it also featured the reincarnated souls of the swordsmen who had left no descendants, such as Sabito and Makomo.
If he forcibly brought Yoriichi Tsugikuni back, who knew what kind of chain reaction it might cause?
Ultimately, Yoriichi Tsugikuni could be considered the pinnacle of the Demon Slayer World, but even he hadn't escaped the shackles of life and death.
In this world, becoming a demon was probably the