Naruto: Chakra System

Meanwhile, on Sakura's side, Kakashi had sent a Shadow Clone with her to the medical department, to have her learn Medical Ninjutsu from Medical-nin, Kiyoki. Now, with his Shadow Clone with Sakura, he could also learn Medical Ninjutsu, which are obviously very useful.

While Kakashi knew Shadow Clones are useful in gaining and improving strength, they also had many limitations, like they couldn't help him in physical training, nor in learning techniques like Eight Inner Gates and Senjutsu art. Shadow Clones couldn't be used for those.

But in anything related to chakra manipulation, Shadow Clones are very useful, like the way Kakashi is using them. Rasengan training of applying nature transformations is all about Chakra manipulation, Fūinjutsu is also mostly related to chakra manipulation, and Medical Ninjutsu is also related to chakra manipulation.

But Senjutsu 'training' includes natural energy, which cannot be sensed and merged with chakra by Shadow Clones alone. Eight Inner Gates requires chakra points in the body, which obviously Shadow Clones cannot help with, and the same is the case for Physical training.

With understanding this much, Kakashi knew that Senjutsu training had to be done by himself; but for now, he didn't have to bother with things that could be handled by his Shadow Clones.

Within the next few weeks, the Land of Waves mission would come, and at that time, he would be able to learn Medical Ninjutsu for self-healing easily, as he didn't have to become a Medical Ninja. Plus, even the Dimension-type seal now had chances of being on his palm before the Land of Waves missions.

Though he didn't want Zabuza and Haku to die this time, but if they did, then he would obviously have Kubikiribōchō, the Executioner Blade, for himself, and if not, then he would only and definitely have Gato's wealth for himself; in both cases, he would definitely be a rich man.

Currently, Sakura had been instructed by Kiyoki to read the basic medical books to gain theoretical understanding of a ninja's body and medical stuff, which Kakashi was also doing. And with his Mangekyō Sharingan, he could easily read those books, but obviously, he was going to do that in secret.

Sakura, sitting in the staff room of the medical department, reading the medical book she was instructed to, sighed heavily. She complained to Kakashi's Shadow Clone, "Sensei, do I really have to do all this?"

Kakashi's Shadow Clone, sitting beside her, asked, "Why, weren't you very determined that day, for learning Medical Ninjutsu? Now, has all that determination gone within a few days?"

Sakura sighed again. "I'm not talking about medical ninjutsu, but about these 5-7 inches thick medical books," she said. "Do I really have to read all those?"

Kakashi's Shadow Clone tapped her shoulder lightly. "Don't worry, I am with you. Just give this book to me and..."

Sakura cut in. "And you will read this all out for me, but I shouldn't look towards you until then, right!"

Kakashi's Shadow Clone chuckled lightly. For the last few days, he had read two of the medical books that Sakura had to, and with his Mangekyō Sharingan, he had read all those thousands of pages within that time, and explained them to Sakura as well, though Kiyoki still instructed Sakura to read them all personally, later.

Sakura rolled her eyes at Kakashi's Shadow Clone and muttered, "Looks like Sharingan are really very convenient. Hope I could also get my hands on one in the future, but phew, Sasuke-kun is the only person alive from his clan, oh, and his brother as well."

Though she spoke in a low voice, Kakashi's Shadow Clone heard her and chuckled. After all, even if there are only two known Uchiha alive, and one is unknown to the world—his teammate, Obito Uchiha—however, there are still many pairs of Sharingan besides those three, and many are still in Konoha.

Kakashi's Shadow Clone jokingly said, "Sakura, do you really want a Sharingan? If yes, then I can get one for you in the future."

Sakura glanced at Kakashi's Shadow Clone wearily. "Really, but I actually don't want one, as you said, that Sharingan is chakra-draining. I don't want that. I can become strong even without that, right?"

Kakashi's Shadow Clone raised his brow. "Is that a question?" he asked. "Why, do you not trust your own strength?"

Sakura chuckled embarrassingly, scratching her pink hair. She indeed didn't have much confidence that she could become very strong; at most, she also thought that Chunin was her limit.

Kakashi's Shadow Clone said, assuring her, "Don't worry, you can also become a Kage-level powerhouse, just believe in yourself and me."

Sakura smiled brightly; just this assurance was enough for her, especially when Kakashi even went out of his way to have Sakura learn Medical Ninjutsu. Moreover, for Kakashi, having her join the Medical Department also needed approval from Hiruzen.

After all, Sakura was just a Genin for like two weeks; how could anyone join any department this early? And the medical department, despite looking simple, is actually a very important one and hard to be part of.

After all, Medical Ninjutsu is not all about requiring one to have high chakra control and learning a few healing techniques; it also requires thorough understanding of a ninja's physiology, and various poisons and medical herbs, and other related stuff. This all can easily take one at least 3 to 4 years; no one can become a medical ninja that easily.

But Kakashi was able to convince Hiruzen, after all Sakura had superior chakra control, and once Kakashi evaluated her talent, of how she mastered Tree and Water Walking within just 3 days only, which even Hiruzen wasn't able to do. Hiruzen at that time only muttered one thing, "Even Tsunade has needed 5 days to mastered them."