After finishing the theoretical explanation, Sanada Tomohisa stepped down from the podium and began personally demonstrating the Three Basic Ninjutsu Techniques.
"Watch closely, everyone! This is the Transformation Technique!" Sanada Tomohisa formed the "Ram" hand seal, and the students could vaguely sense his Chakra flowing through his body.
BOOM! Amid a faint puff of smoke, Sanada Tomohisa transformed into the Third Hokage as everyone remembered him. Then, he demonstrated the Clone Technique and Substitution Technique in turn.
After the demonstration, Sanada Shiku finally managed to calm some of the excited students before adding, "Don't think it's easy just because I made it look easy. There are techniques for using Chakra and coordinating it with hand seals. I believe you've all already mastered the twelve hand seals, so now I'll explain the principles behind ninjutsu."
"Let's use the Clone Technique as an example, since it has three hand seals."
"The process goes like this: before activating a ninjutsu, use the Chakra Refining Technique to refine Chakra. Then form the 'Ram' seal while making the Chakra inside your body flow in accordance with that seal. I'll tell you the specific flow pattern shortly."
"The following 'Snake' and 'Tiger' seals follow the same process. Take note: before the Chakra cycle for the 'Ram' seal is complete, you cannot directly form the next two seals. Doing so will cause the ninjutsu to fail."
"Once all three seals are formed, and the Chakra flow corresponding to each seal is complete, release the Chakra. Then the Clone Technique will be successfully performed."
After Teacher Sanada Shiku's detailed explanation, Shuichi finally understood how ninjutsu worked.
Simply put, forming hand seals while directing the corresponding Chakra flow was a way of selecting and activating certain properties of Chakra, then combining multiple properties together.
The same hand seal could produce different effects in different ninjutsu, and the unique flow pattern coordinated with those hand seals was the secret to learning ninjutsu.
Otherwise, if one could learn a ninjutsu merely by watching the hand seals, ninjutsu would be impossible to keep secret.
That was why Kakashi in the original story could copy other people's ninjutsu. His Sharingan copied the other person's Chakra flow routes, and only because he also possessed the corresponding Nature Transformation could he successfully replicate them.
Uchiha Itachi's Great Fireball Technique was another example. In less than a second, he formed six hand seals while Chakra completed six different cycles inside his body. Every seal and cycle coordinated perfectly, and then Fire Release: Great Fireball Technique was successfully unleashed.
Naturally, hand seal speed had absolutely nothing to do with hand speed. It was a reflection of a person's Chakra control.
The fact that powerful ninja could simplify the hand seals for ninjutsu later on, and that a few geniuses could even form seals with one hand, was because their Chakra control far surpassed that of ordinary people.
Once he understood that this was what ninjutsu was, Shuichi also understood why the Ninja Academy only required students to master the Three Basic Ninjutsu Techniques over several years.
Most students needed a long time to practice these Chakra flows, not to mention that children had very little Chakra to begin with, which limited how much they could train each day.
Likewise, if the Three Basic Ninjutsu Techniques were mastered thoroughly, less time would be needed to learn higher-level ninjutsu in the future. That was the importance of a solid foundation.
After explaining all these details, Sanada Shiku decided to begin ninjutsu instruction with the Transformation Technique, since it only had one hand seal and would be easier for everyone to get started with.
Shuichi listened very carefully. The process was just as the teacher had said: first refine Chakra, then form the hand seal. At the same time, control the Chakra to flow through specific acupoints in the body before releasing it.
Sanada Shiku did not have the students begin practicing in class. Instead, he told them to focus on memorizing the flow route and informed them of the appropriate training amount for students their age.
"You're all still quite young, so listen carefully to this important point. Everyone's Body Energy and Mental Energy will certainly not be exactly the same, but the differences won't be too great either. When you go home, what you need to do first is refine Chakra, not start practicing ninjutsu."
"When your Body Energy is insufficient, you'll gradually begin to feel weak all over. When your Mental Energy is insufficient, your attention will begin to scatter. The moment you show even a slight sign of either condition while refining Chakra, stop immediately. The amount you have refined is the limit of how much Chakra you can use in a day."
"And I suggest that you stop training after using sixty percent of that amount in the future, because you need Body Energy to grow. If any of you refuse to listen, you may end up unable to grow taller later. Don't blame me for not warning you."
Sure enough, the possibility of not growing taller immediately brought the excited children back to their senses. Once they learned that their daily training was limited, they restrained themselves from starting right away and decided to practice after returning home.
After school that afternoon, the students were especially excited. Even Ishikawa Tatsuki merely said goodbye to Shuichi before sprinting home, leaving Shuichi to marvel at how strong children's curiosity was.
After dinner at home, Shuichi came to the center of his room. First, he carefully recalled the details of the Transformation Technique that the teacher had explained and simulated the process of using Chakra in his mind.
Once he was fully prepared, Shuichi brought his hands together to form the "Ram" seal. With the Chakra Refining Technique he had already mastered, he quickly refined Chakra and then circulated it along the flow route the teacher had described.
Because the system had added a point to his third skill, his reactions and thinking far surpassed those of ordinary people. Controlling this Chakra felt exceptionally easy. He quickly completed the cycle for the seal, then released the Chakra throughout his body.
BOOM! With Ishikawa Tatsuki's appearance in mind, he successfully completed the ninjutsu.
Walking over to the small mirror on the table, he examined his current appearance. He looked eighty percent like Ishikawa Tatsuki, though his nose and eyes were slightly different.
When the Chakra maintaining the Transformation Technique ran out, there was another soft sound and a faint puff of smoke as he returned to his original appearance.
"Ninjutsu is really fun!" Shuichi forgot the mindset he had when mocking the other children. It was as if he had discovered a whole new continent.
After successfully performing the technique, Shuichi did not immediately cast it a second time. Instead, he first memorized the physical sensation of using it.
Before the second attempt, he carefully recalled every detail of Ishikawa Tatsuki, especially the arrangement of his facial features. Once he was ready, he performed it again.
BOOM! Afterward, he looked into the mirror again. "It looks very convincing now. The resemblance is over ninety-five percent."
Next, he began trying to transform into Yūhi Kurenai, Kakashi, and others. When he transformed into Teacher Sanada Shiku, he found that the height difference was considerable. Only after checking twice in succession did he barely manage to make it look convincing.
Looks like Naruto and Konohamaru had really studied those beauty magazines closely. They could actually transform so convincingly. Shuichi thought with a hint of mischievous amusement.
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