Kakashi couldn't understand what Yasu meant when he said that unleashing the true power of Thunder Breathing required a specific breathing technique.
While leading Kakashi, Yasu explained: "The breathing technique that complements Lightning Breathing isn't ordinary breathing; it's a breathing method called 'Total Concentration Breathing'. Its main function is to enhance the cardiopulmonary function, allowing the blood to absorb a large amount of oxygen in a short period, temporarily and drastically increasing physical abilities."
"Only when the Thunder Breathing is combined with Total Concentration Breathing can its full power be unleashed. Without this breathing technique, anyone using Lightning Breathing can only imitate its form but not its essence, resulting in a significant difference. Moreover, learning Total Concentration Breathing will greatly enhance your concentration and improve your eyesight."
Kakashi asked curiously: "Is this breathing technique really that amazing?"
Yasu nodded: "Once you learn it, you'll naturally understand. When we reach the land of Grass, I'll start teaching you the breathing technique."
Kakashi was still skeptical about the so-called magical effects of the breathing technique, as he had never encountered such a miraculous breathing method before.
If it could truly temporarily and drastically increase physical abilities in an instant, then this breathing technique wouldn't only be applicable to Thunder Breathing but also to other aspects.
The journey to the land of Grass was similar to the journey to the land of Hot Water, taking about five or six days.
During these few days, Yasu didn't teach Kakashi anything but instead focused on understanding his current strength.
Just like when Orochimaru took him as a disciple, he had assessed his strength before creating a training plan for him.
Over these few days, Yasu gained a systematic understanding of this new disciple of his.
Kakashi was indeed a genius who could become a Chunin at the age of six.
He was skilled in using the Hatake clan's swordsmanship, combined with Body Flicker Technique to ambush opponents.
His speed was very fast, comparable to Minato during his time at the Ninja Academy.
His ninjutsu skills, however, were average.
Kakashi's chakra nature was Lightning and Earth, and he only knew some basic release techniques.
Presumably, Kakashi was too young, or Sakumo wasn't proficient enough, so he didn't teach his son advanced jutsus.
So, he began planning Kakashi's upcoming training.
Now that he had become his teacher, he had to be responsible.
Moreover, it was very likely that Kakashi would be a companion walking the same path as him in the future.
First and foremost was the breathing technique. If Kakashi wanted to improve his combat power, he could only thoroughly master Thunder Breathing.
Then there was reaction speed and dynamic vision, as well as some advanced Lightning and Earth Release ninjutsu.
As for the Sharingan, now that Kakashi had become his disciple, he wasn't sure if Kakashi would still obtain Obito Uchiha's Sharingan in the future.
Even if he did, Yasu didn't plan to let Kakashi transplant it.
Because in his view, the disadvantages of Kakashi transplanting the Sharingan were too great.
It directly led to the system using Kakashi as a unit to measure chakra. (Pfftt…)
Although Kakashi copied thousands of ninjutsu in the future through the sharingan, were these ninjutsus really that useful?
Nop, totally useless.
Because the sharingan had even greater disadvantages for Kakashi, consuming his chakra at all times like a parasite.
It was good enough if he could use a few ninjutsu in battle.
Using a few more would directly deplete his chakra.
The title of Konoha's Number One Technician sounded more like a joke.
With Kakashi's talent, Yasu felt that if he didn't have the sharingan, Kakashi's potential would definitely be higher.
What's more, he had his guidance.
Yasu was confident that his own strength would become stronger and stronger in the future, and he would teach Kakashi the skills he learned from the system that could taught to people.
Wouldn't that be better than copying thousands ninjustu, but only being a "three-second man"? (Damn…)
For Kakashi, who didn't have the bloodline of the Uchiha clan, anyone who wanted this sharingan could have it.
Look at Orochimaru, he even needed Sasuke Uchiha's body to obtain the sharingan.
Was it that Orochimaru couldn't obtain the Sharingan?
No, it would be too easy for him to obtain it, but it was because he knew its disadvantages that he didn't choose to transplant it directly.
Even Danzo had Orochimaru create a Wood Release arm for him, then transplanting the sharingan onto the Wood Release arm.
After planning Kakashi's upcoming training plan, the two finally arrived at the Land of Grass.
After arriving at the Konoha ninja base in the land of Grass, Yasu and Kakashi went to Hatake Sakumo's room to visit him.
Sakumo wasn't surprised to see Yasu, because he had already received the news that Orochimaru's disciple, who was unusually active in the land of Hot Water, had been transferred to the land of Grass.
But he was very surprised to see Kakashi.
"Kakashi, why are you here?"
"Father, I have already become a disciple of teacher Yasu."
Sakumo looked at Yasu with his mouth slightly open.
He had Kakashi participate in the assignment to form a three-person team to follow the Jonin leader together, wanting Kakashi and his teammates to become friends.
He didn't expect Kakashi to bring him back a teacher directly.
What a big 'surprise'.
Sakumo sized up Yasu.
He didn't know much about Yasu, he had only heard about him from other people's mouths.
Of course, they were all extremely unpleasant words.
But Sakumo didn't care about these rumors, and instead felt that Yasu was quite outstanding. ('Didn't care about these rumors', quite ironic because a year from now he started caring a little bit too much…)
In this environment, he didn't become discouraged, but instead became more and more courageous, and was accepted as a disciple by one of the Sannin, Orochimaru.
In a short period of a few years, he became a Jonin, which was enough to show that Yasu had extraordinary talent.
Moreover, Sakumo had also studied the plan formulated by Yasu's participation in the land of Hot Water at that time.
Regarding it, Sakumo combined the situation and military strength of the Land of Hot Water at that time, and his evaluation was that it was too radical, so radical that it was almost a mess, but it was very thoughtful.
It can be said that Yasu's plan was equivalent to burning the boats.
Regardless of success or failure, the losses would still be very large.
Once successful, the benefits obtained could be ignored compared to the losses.
At the same time, Sakumo also admired Orochimaru for agreeing to his disciple's plan.
Most importantly, as Orochimaru's disciple, Yasu was definitely a member of the Hokage faction.
Therefore, although it was the first time they met, Sakumo had a good impression of him.
Moreover, he didn't object to Kakashi becoming Yasu's disciple.
Because Yasu was outstanding enough and was considered to be a good person, only his reputation was not very good.
Sakumo pulled out a smile towards him: "So Yasu, you are already Kakashi's master, I will trouble you with him in the future."
Sakumo himself was a serious person.
So, this smile that he suddenly showed looked awkward no matter how you looked at it.
Yasu said to Sakumo seriously: "Kakashi is very excellent, I will do my best to teach him, so please rest assured, Lord Sakumo."
Sakumo nodded: "It is Kakashi's honor to be your disciple, I am very relieved."
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