Legendary Breathing Technique Improvement-Everything Will Get Better Once We Enter the Warring States Era!

Uesugi Tetsu was startled when he heard this.

No breathing technique?

He heard Ririko say with a slight frown, "I asked the Special Affairs Division and Sister Nanjō about this before, too."

"Unless you've achieved something equivalent to single-handedly exorcising a Ghost God-level Great Demon, it's impossible to obtain a breathing technique more complete or advanced than the Corona Breathing Technique."

"—It seems there are quite a few breathing techniques with roughly the same degree of completeness as the Corona Breathing Technique to choose from. But anything above that is impossible to come by."

Actually, this was perfectly normal.

His and Ririko's Corona Breathing Technique had originally been obtained through a back door, under the joint guarantees of Kondō Yūya and Nanjō Emi.

Expecting to get an even more complete and advanced breathing technique just by asking was simply too optimistic.

Although if Uesugi Tetsu asked, Nanjō Emi would definitely find some way to get it for him, even if she had to travel everywhere and beg countless people.

But things had not yet reached that point.

Uesugi Tetsu thought.

Breathing techniques. Weren't there plenty of them in the Warring States era five hundred years ago?

Although cultivation was more difficult in the Warring States era, and it was indisputably an Age of Absolute Spiritual Desolation when the Onmyoji had withdrawn from the world, powerful and complete breathing techniques definitely existed.

Given his relationship with Imagawa Yoshimoto, obtaining one would not be too difficult.

Besides, Tokugawa Ieyasu was still a hostage under Imagawa Yoshimoto at that time.

If he built a good relationship with that old tortoise as well, perhaps he could even get an introductory version of the Four Extremes Breathing Technique.

As long as he used the second ring of the Key of History to enter the Warring