One day a 5 year old Naruto was playing in the sand in the playground located in the centre of Konoha and a girl came up to him and asked "hey, that looks fun, can I play too?"
Naruto replied "uhh...sure, I guess, why?"
"Because, I feel like we could be friends, so, can we?"
"Uhh, sure, I don't see why not."
"Cool. Say, do you know what you want to be when you grow up?"
"Yep, sure do."
"Really? What's that?"
"The greatest Hokage ever."
"Hokage? Why do you want to do something like that?"
"Because, I want everyone in this village to recognise my existence."
"Really?"
"Yeah."
"You know that Kage's need to be able to perform high-level ninjutsu, right?"
"Yeah, what of it?"
"Well, you need a really large amount of chakra to be able to perform them."
"Charka, what's charka?" Naruto asked.
The girl let out a ringing laugh and exclaimed "you want to be Hokage and you don't even know what chakra is? You're funny."
Naruto, who had been really excited at the possibility of gaining a friend for the first time in his life, only to have her laugh at him, hurt him immensely. As tears started to well up he turned and ran away from the girl, not wanting to be around her to let her see them.
As Naruto was running through the streets he bumped into someone, causing him to fall backwards. the man bent over and helped Naruto back up and, seeing that he was crying, asked him "what seems to be the matter?"
"I...I...I..." Naruto started to say, breaking into sobs.
"You know what, how about I treat you to lunch and then you tell me?"
Naruto wiped his eyes and said "sure."
The man asked "so, is there anywhere in particular that you like to eat?"
"Yeah, Ichiraku Ramen Stand."
The man looked up and thought 'I should have known, just like his father.' When they arrived at Ichiraku's Naruto ordered twelve large bowls of Miso-Pork Ramen to the man's dismay. The man said "alright, I know who you are Naruto-kun, I'm..."
"How do you know me Ossan? I never told you my name."
"Naruto, the entire village knows you" the man said flatly. "Anyway, I'm Kosuke. If you don't mind my asking, what was the cause of your distress?"
"My dis-whats-it?"
"Why were you running through the street crying?"
"Oh, well there was this girl who asked to be my friend and then laughed in my face when I said I didn't know what charka is."
"I see...wait...charka?"
"Yeah...hey, you're a ninja right?"
"Yes."
"And you're pretty old, right?"
The man coughed on his food at Naruto's question and replied "that's really a rather rude thing to ask, but yes. I am 'pretty old' as you put it."
"Then you know what charka is, right?"
"Well, first of all, it is chakra, not charka. Secondly yes I do. Chakra is essential to even the most basic technique; it is the molding of the physical energy present in every cell of the body and the spiritual energy gained from exercise and experience. Once moulded, it can be channelled through the chakra circulatory system. Through various methods, the most common of which is hand seals, the chakra can then be manipulated to create an effect that would not be possible otherwise, which we know as ninjutsu. There are also other, less well known, applications of chakra as well."
"Really? So it's the thing that you need to perform ninjutsu?"
"Exactly."
"So, since you're old and so is the Hokage, that means that you must be pretty strong too, right?"
"Well, that's a question that has an answer that would change depending on whom you ask. But yes, I have been told so."
"Really? Cool. So, can you teach me some cool ninjutsu?"
"Hmm..." Kosuke said as he thought 'his chakra capacity is huge as it is, plus with the Kyuubi's chakra flowing around inside him ninjutsu will probably be a bit hard for him to learn...maybe...' he then said "I'll tell you what, why don't you forget ninjutsu for now..." as he said this Naruto extended his bottom lip "...and I'll teach you something that will probably be a lot easier for you."
After he heard that Naruto retracted his lip and excitedly said "sure! What is it?"
"Kenjutsu."
"Kenjutsu?"
"Yes."
"Well, alright" Naruto said, kind of disappointed that he wouldn't be being taught ninjutsu, but glad that he was being taught Kenjutsu anyway.
"Good, I'll teach you the style that I use..." he thought 'that was taught to me by your mother.' "...that uses a hand and a half kodachi."
"A what?"
"To what are you referring? Surely you have heard of a kodachi before?"
"Yeah, I think I heard of a type of sword called a kodachi in a Princess Gale movie."
Kosuke laughed and said "yes well, that's true I suppose."
"But what I meant was what you meant by a 'hand and a half' kodachi."
"Ah yes. Well there are many types of swords in existence. But they all fall under three categories: one handed, two handed and hand and a half. The first two's meaning should be obvious. A 'hand and a half' sword though is one that can be used as either a one handed weapon, or a two handed weapon, which offers more versatility."
"Oh, well, alright then. When do we start?"
"Well, I'll need to talk to the Sandaime about taking some time off &, after that, we'll need to get you a sword of your own. So, in all, about two weeks, give or take a few days. I'll meet you again here tomorrow at 10 AM to tell you what will be happening, alright?"
"Sure thing Ossan, see you tomorrow."
That night around a dinner table in the Uchiha compound that girl was saying "so today I met this boy and I tried to be his friend but then he ran away from me..." as she did so she felt something pull on her heartstrings.
"He ran away? Why did he do that Seiko?" Mikoto asked.
"Well, I said that he was funny when he didn't know what chakra is."
"Heh, seems like a real dobe to me" Sasuke scoffed.
"Sasuke, that was..." Mikoto started to say before she was cut off. As Mikoto was trying to reprimand Sasuke in a firm, but calm, manner, Seiko was furious. As a matter of fact when Sasuke looked at his sister, her eyes were red and he could see volcanoes erupting in the background. He had seen his mother transform into a demon like that and never wanted to experience fear like that again. When Seiko started to growl out his name, Mikoto said "Seiko, Sasuke didn't mean anything by it, did you?" in a manner that was calm and collected when she was referring to Seiko, but when she was talking to Sasuke, her tone was pointed and informed Sasuke that there would only be one acceptable answer. Mikoto thought 'so, it's more than just friends for Seiko is it?'
"Hai" Sasuke said in a mollified tone.
Mikoto then looked at her daughter and said, "Well, Sasuke's reaction aside, what you did was very rude and you should be ashamed of yourself. The boy is probably from a civilian family, they usually have no knowledge of chakra or its uses."
"I see..." Seiko said, thinking of the possibility that Naruto was born into such a family.
"Well, his family aside, what you did was really rude, I want you to apologise to him tomorrow."
"Hai Okaasan" Seiko dragged out, not due to some rebellious streak, but because she was thinking about how she could have reacted differently.
The next day Seiko was at the park again for the full day but still couldn't find Naruto to apologise for her earlier actions. She spent the next two weeks searching all over the park for possible places that Naruto could be, but they all came up fruitless. The day after that, on her way to the park, she saw Naruto and Kosuke, though she didn't know who the old man he was with was, exiting a store with Naruto having a sword strapped to his waist. Seiko thought 'civilian family huh?'
That night, at the dinner table, Seiko asked, "hey Okaasan, can I learn Uchiha-Ryū Kenjutsu?"
"Sure, I suppose so. What brought this on?" Seiko's reply came in the form of a blush that reached her hairline. Mikoto thought 'so, that's why eh?'
Uchiha Fugaku asked "why the sudden interest in Kenjutsu Seiko?"
Mikoto, knowing the answer, said, "that doesn't really matter does it dear?"
"Well, I suppose not. I'll talk to Amayah; she retired recently so she won't have anything to do really."
"That sounds good dear."
"Hey, can I learn Kenjutsu too?" Sasuke asked.
"No" Mikoto replied.
"Ehh! Why not? She is!" Sasuke exclaimed as he pointed at his elder sister.
"That's exactly why."
"Huh?"
"You only asked just now because Seiko did. Had she not, you wouldn't have said a word about it. Am I wrong?" seeing that Sasuke was about to disagree with her, Mikoto said "and don't lie either."
Sasuke sighed saying "no Okaasan."
"I didn't think so."
"I'll tell you what, how about I teach you a Katon ninjutsu instead," Fugaku asked.
"Really?" Sasuke eagerly asked.
"Yeah, why not?"
"Sure thing" Sasuke answered happily.