Naruto : The Demon Swordsman

Yoriichi P.O.V

"Well done son, you win" Dad said while my limbs were bound in chains.

He released me afterwards. I put Muramasa back to it's scabbard. It was an interesting fight.

My first fight in this world. It was thrilling. My blood was boiling from all the excitement.

During the past 6 months after mastering the constant total concentration breathing, I learned all 11 forms of water breathing along with variations. Although I couldn't master any form. I mastered them to a considerable degree so that there chakra usage is manageable.

As for my fuinjutsu training, I managed to perfect my calligraphy and I started practicing basic seals like normal storage seals, paper bombs etc.

My physical strength, endurance and speed has increased by a lot. I can even now use two petals( two barriers out of 7) of Rho Aias. But I can maintain it for only 2 minutes. And another additional 10 minutes if I use my scabbard's chakra. It's going to be a life saving Trump Card .

"Let's talk more about the fight while having lunch." Dad said

Dad and me went to the living room to have lunch where we found Grandpa having his lunch while mom went to get the food from kitchen.

"That was such a wonderful fight son." Dad said

"Oh you two had a spar?" Grandpa asked curiously

"Yes, We fought with swords for hours before having a spar with ninjutsu. You won't believe me Yoriichi used such fluent and beautiful kenjutsu. Not only that but he also used ninjutsu without hand signs. He even used nature transformation and shape transformation. His attack power, strength ,speed and stamina are way higher than any 4 year old I have seen." Dad said excitedly

Grandpa had a shocked look on his face and he might have choked on some of the food he was having.

"How are you so good with the sword Yoriichi? I have been practicing with the sword for a really long time and I have not seen anyone with movements and sword strikes as you. And who taught you all this?" dad asked

I looked at dad seriously "To be as good as me, you have to be one with your sword. And the other reason that I am better than you is I have a sword heart unlike you father."

Dad looked at me dumbfounded and said

"Fine, keep your secrets but tell me how you managed to increase your physical strength this quickly."

"Oh, I just developed a breathing method . I call it Total concentration breathing." I shamelessly said

Then I explained them about how to do it and the benefits.

They looked at me proudly

"Hahaha, my grandson is a genius amoung geniuses, even Tobirama couldn't develop new techniques and jutsus when he was 4. I can't wait to brag about it to that wood pecking bastard hahahaha"

Dad got up and got me some talisman earrings that just looked like the hanafuda earings that. Yoriichi and Tanjuro wore in the anime.

"This is a gift from me to you son. Uchiha clan's Kekkei Genkai Sharingan allows them to copy various things, we used these earings during the warring states period when we used to fight them so they can't copy our fuinjutsu or other special jutsus. These earrings are also a symbol of Uzumaki family. Don't lose it as it is made up of a very rare ink."

"Thankyou father" I was excited because even if the uchiha can't copy my breathing techniques according to God, it's good to have precautions besides I will be making new jutsus in future. I don't want them to be copied.

Also I have my own ability that will resemble ability of sharingan 'Eye of insight'

Yes , I am talking about Transparent world

The bearers of the demon slayer Mark can potentially gain access and see into the 'Transparent World', allowing me to perceive the bodies of others as if their skin was transparent. This will enable me to track the flow of blood, breathing, muscular contractions and joint movements of the person I am looking at which can be used to predict their movements and evade their attacks with ease. Additionally, those who can access the Transparent World can perceive the world in slow-motion, further increasing my reaction and movement speed.

I can't wait to unlock my demon slayer mark.

"Also I have noticed that you lack a little bit in long range combat and Genjutsu. I will be teaching you about them starting from tomorrow. I want you to learn these things before you start going to academy next year." Dad said

Grandpa said "You should not worry about your breathing technique getting leaked because every major clans have their own breathing techniques including us. If you don't mind Yoriichi should we add this technique into our archives."

"I don't mind grandpa as long as you teach me A- rank jutsus and even S rank jutsus kekekeke"

"Sure someday I will definitely teach you a S- class jutsu hahahaha"

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Author Notes

So i gave them these earings so that I don't leave any plot holes that why the uchiha didn't copy his technique or not or any jutsu he makes in future.

Also why Uzumaki has such a thing well if uchiha can copy anything except kekkei Genkai then why did not they copy Uzumaki 's fuinjutsu. And I believe there were many jutsus that they could have copied but I didn't see them using it .

Onoki's light weight and heavy weight jutsus , tobirama's water jutsus , or even Hiruzen jutsus or even danzo's wind style or Tobirama's water style. If they could have copied it , they would have used it against Itachi who btw was just a teen when he massacred his entire clan without even using his mangekyō ability .Itachi only used 2 jutsus throughout the story outside of clones , Genjutsu and his mangekyō abilities fireball jutsu and phoneix flower. So in this story I will be assuming they won't be able to copy jutsu above B rank or any jutsu without hand signs. if you have some suggestions regarding this, please be free to give them.