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Notes:

This is a plot that I have come across a few times but most of them are just not quite what I have been looking for. So, I wrote what I wanted to real. Don't get me wrong, there are some good stories out there that I love for one reason of another. There is nothing wrong with these it's just that I wanted to give this a shot and see if anyone else out there was looking for this kind of story.

A major thing I want to acknowledge is the time setting from each side of the crossover. So, spoilers if you have not completed either narrative.

For "Naruto", it is basically post manga series. This story has this half of the crossover taking place after chapter 699 and even a little later than that but not all the way to chapter 700 epilogue.

For "Harry Potter", it is the summer between Order of the Phoenix and Half Blood Prince. This first chapter is an exception due to setup.

Now, onwards!

Chapter One: Old Blood, New Blood

Posted October 14, 2018 … Revised January 28, 2019

The dusty Defense Against the Dark Arts classroom was quiet except for the sound of occasional pieces of parchment shuffling around. A young Harry Potter, just coming into his teenage years, was absorbed in a small personal journal that had been in the possession of his late father, James Potter. It had been a small gift to Harry from his Defense professor, Remus Lupin.

After a few weeks of practicing the Patronus charm in the privacy of the classroom walls, professor and student had gotten close after Remus had let slip that he and two other people had once been close friends with James during their own school years at Hogwarts.

Harry had been pleased to learn anything and everything about one of his parents. So, the young preteen had clung onto every word Remus said during each visit.

With stories being an added part of their time together, Harry had soon found himself spending quite a bit of his free time with the Professor in hopes of learning as much as he could about both the charm and his relatively unknown father.

Wanting a bit of time to himself after weeks of teaching during both his work hours and personal time, but not wanting to completely leave Harry without anymore tales, Remus had finally handed over the journal after having spoken about it a few times already. The older man told Harry that James had given it to him after Harry had been born and that if something were to happen to him, Remus was to give it to Harry when he thought he was ready.

It turned out that James had personally charmed the leather-bound book so that only someone with his blood flowing through their veins could open it.

And after leaving it in the hands of arguably the most trustworthy marauder – and a smart marauder at that – James had handed it over to Remus for safe keeping.

Harry was not sure why now seemed like an opportune moment to be given such a precious gift, but looking at his Defense Professor, Harry noticed how he seemed to look wearier and more exhausted as the days passed. Remus seemed to act more anxious as the evenings came and went.

Though Harry was not sure why he appeared in such a state, there was a small part in the back of Harry's mind that said he was being handed the gift because Lupin would not get another chance in the foreseeable future. Feeling a bit upset at where his thoughts had been heading, Harry shook his head to brush them away to instead focus on what he had just been given.

When Remus finally handed over the small, almost inconspicuous looking book, Harry had given him such a bright smile that it was almost blinding. It could have been a treasure chest full of the world's best riches, Harry appeared so happy.

"Thank you!" Harry had said before he had raced over to the nearest desk and sat down, journal already opened to the first page.

With a smile on his face, Remus had then left Harry to himself as he went to collect his cloak, telling the young lad that he wanted to spend the afternoon by himself at Hogsmeade.

After Remus left the room, the broad grin slowly sank into a more content smile as he was slowly consumed into the thoughts and words of his father.

The first entry had been when James was eight. For a while, the words were nothing more than childish thoughts and desires such as wanting a new broom or his feelings about the children he was forced to go in play dates with. A few of the surnames were a bit familiar with Harry spotting a Frank Longbottom being mentioned a few times. That was certainly something interesting. Harry decided that he would try to remember to talk to Neville about that.

After a while however, the entries gradually became sparse and were dated farther apart as though James eventually lost interest in keeping up with writing down his thoughts.

The most dramatic jump was from James' last day of his second year at Hogwarts to after graduation.

From there, the entries became less like journal entries and more like notes on his momentary feelings about the ongoing war.

Harry noticed that James wrote a lot about a big group of friends that he sometimes was with. He noticed that names and locations were never written down which seemed a bit odd to him. Harry also noticed that James apparently liked birds since he tended to include such terms in the entries about his group of friends.

Those were the fun ones to read since he always wrote about an old man with a pet chicken. He wasn't sure if it was true or if James was just making up fun stories about his friends to fill in the sad days of war with something else.

Either way, those entries too slowly dwindled down until finally, there was only two pages left in the book that had been filled.

Curiously, Harry noticed that they were dated only a few days before he was born.

The first of the two entries held notes about how James was so happy to be married to his beloved Lily and his thoughts about having kids in a time of war. Harry was surprised to learn that he was named after his paternal great-grandfather and that he would have had younger siblings, if what James wrote was true about wanting to have at least three children.

He was saddened to read that his father was concerned about his mother being pregnant with him seeing as they were currently fighting in a war that seemed never-ending. The entry ended with a slight bitter sweetness to it as James signed off with Here's hoping to fatherhood.

It was the second of the two entries that stood out to Harry the most, however.

Dated the same as the first entry, Harry noticed how different the handwriting was and how, for the most part, the words were scribbled down as though James had been in a hurry to write it all before he forgot anything. Harry was also surprised to see that it was not written like any of the journal entries before now but was instead written directly to him.

.

.

27th July 1980

Dear Harry,

If Remus upheld his end of the promise, you were given this when he felt it was right. Or maybe I'm wrong and you came across this through some other means. Either way, the only way you would have gotten ahold of this was because your mother and I have died.

With us gone, there will most likely be a battle for your custody with quite a few players. Even with our will listing several people, you just don't know if they will live until they are one hundred years old or die tomorrow in another battle. This is war time after all. Thus, I thought it best to write this down someplace that can appear nonthreatening and give it to someone for safekeeping.

I know that if your reading this, you have obviously been placed somewhere to grow up, so this cannot be considered a viable option for you to be placed – unless perhaps you are not yet 17 years old – but this is something that is important enough for you to know even after you've reached adulthood.

Our blood still lives.

Yes Harry, you can read that line as much as you want, and they will never change. And those words are the truth.

You see Harry, I was adopted. Fleamont and Euphemia Potter will always be my parents and I loved them dearly, but I had different, biological parents that I never knew existed until just recently. Apparently, my parents struggled to tell me throughout the years until finally they thought it best to reveal this to me as I was going to soon have a child of my own. I guess they finally chose to say something in case you are born with specific features that could not be passed off something from Lily or traditional Potter traits.

And so now, I pass this knowledge onto you. I must repeat that I never knew this before now and I still know nothing except a surname – Uchiha. Quite the odd name but I suppose it would be odd seeing as my parents found me on the other side of the world when they were traveling. Even after all these years, my parents were still wary to tell me everything. All I know for sure is that I was given up by the Uchiha's for some reason and my parents gladly took me in seeing as they were an older couple and had been having trouble conceiving.

This is all I know Harry. By the time you read this, I can only hope that more information has come to light. I know this will all be quite the shock, but I needed to write this down before I could forget anything.

And now comes an important question you must ask yourself, Harry. Do you go down this route and find long lost family or do you stay where you are, happy with where you were placed? Or perhaps you are already a young man with your own family and have no want to seek this mystery out. Either way, it is up to you determine if finding these Uchiha would be worth finding more family.

Again, I cannot even begin to imagine where you are or how you currently living. There are so many paths ahead of me right now and I can only hope that I am by your side as you are currently reading this. Or perhaps you will never have to read this.

If that is not the case however, you must make this decision on your own.

I realize as I am writing this that if for some reason you believe this information to be false, I have no proof with just these words. And so, after writing this, I will go to Gringotts Bank and comprise a new family tree using my blood. When I was adopted, apparently a contract was signed with Gringotts saying that all Potter Trees must be charmed with Goblin magic to show only my blood adoption and no originating ties. But if I make a new tree with fresh blood, I can make it reveal its secrets once you've added your own blood to the tree. The best bet will be for you to use a few drops while casting the words "Originum sanguis revelare." If you get lost, just ask for help from the Goblins; they know what they're doing.

Well, there's not much more to say than that. I know this will be a lot to take in, especially if horrible and unpredictable things have happened to you. Just please know that even after all the wills were written and scenarios were thought up, your mother and I would have wanted nothing more than to be there with you and see you grow up to be such an amazing wizard.

I love you son and you can bet Lily loves you more,

James Potter

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Harry read the entry quite a few times. The first read through was such a large shock that Harry thought for sure a large boulder had dropped onto his shoulders. They suddenly felt so heavy with all the new knowledge that Harry simply wanted to slump down and rest his head on top of the wooden desk to process everything.

The way James had signed off the letter had been what finally brought tears to Harry's eyes that when he began rereading the entry for the second time, they trailed down his face and fell onto the parchment and desk.

A strange mix of happiness and sadness swirled within his body as he sat there and took in the words from his father. His blood. The man that Harry had heard amazing stories about from Remus and a few other professors. It was proof that he had truly been alive at one point in time and was not just a story told by others.

He had thoughts of his own and had worried about things all people do. And that included his concerns for Harry. His one and only son that he dearly loved.

When the contents of the letter finally came crashing into the forefront of his mind, Harry felt the anger, sadness, and finally elation at the realization that he had more family out there somewhere in the expansive world.

Yes, outright believing what James had to say might have been difficult for some but for Harry, he just felt that what his father wrote was true. It seemed like too much work for someone to make up and while it was possible Remus could have made up the entire thing, Harry felt that did fit with how the older man portrayed himself.

And his family was alive!

Or at least, some other family that was not Aunt Petunia or Dudley was out there.

There were people that were as real as the Dursley's and hopefully a lot nicer. The more he thought about these mysterious relatives, the more curious Harry felt. The more excited he became. He wanted to meet them and live with them.

He wanted to grow up with family that would love him like Mr. and Mrs. Weasley loved their own children. Harry wanted to feel and experience and finally understand what it meant to have a family.

It was all of Harry's wildest dreams and it was slowly coming true.

Ever since he could remember, Harry had always wished that some distant relative would sweep him off his feet and take him away from his horrible aunt and uncle. Sure, it was now up to him to find them instead of the other way around, but all the same, this meant that if Harry could find his long-lost family, maybe they would take him in.

The thought made Harry so happy and excited that he stood up, as though he could run away from Hogwarts right at that moment to go and find his new relatives.

He paused however, when he realized he now only knew as much as his father had – a single name, Uchiha.

Now more determined than he had ever been with anything else in his thirteen years of life, Harry finally stood up to his full, albeit smaller than average height, safely packed James' journal in his shoulder bag, and headed for the classroom door. He was startled back when it opened before he could reach for the handle and Hermione filled the archway with Ron hovering at her shoulder.

"There you are Harry. We were looking for you for a while now," Hermione said with an exasperated smile on her face.

"Sorry guys, I was just talking with Remus for a little bit." Harry said, not lying, but not wanting to tell them the whole truth. He wanted to keep the journal a secret for now at least. It was a bit selfish to keep all the information for himself, but there was no real need or any danger in saying otherwise.

Hermione stared at him with a raised eyebrow as she tilted her head to look behind Harry into the empty classroom. She then moved back to stare at Harry with an even higher raised brow, "And where is Professor Lupin then?"

"Oh! He, uh, just left. Said he wanted to go to Hogsmeade for a while. I was just heading out when you found me."

The smart Gryffindor said nothing to call out his fib, and instead shifted focus, "Well anyways, Ron and I were looking for you so that we could go the library like we said we would yesterday. Don't tell me that you forgot that we promised Hagrid that we would try to find books to help Buckbeak's defense."

Harry opened his mouth to protest. He would much rather spend time trying to find leads about these Uchiha or even anything about the wanted man, Sirius Black, but he saw the look that Hermione gave him as he begun to object.

He deflated in an instant and nodded in agreement. She was right. They did want to help Hagrid and Buckbeak out, so as much as Harry would rather be spending his winter break finding information on the other two subjects, he knew that he should at least help Hagrid out first. It was the right thing to do.

.

.

The rest of Harry's third year passed soon after that.

He followed Hermione and Ron to the library as promised and afterwards, things naturally kept falling into their path until Harry completely forgot about his father's journal.

The quidditch match with the dementors, the time turner fiasco, and especially Sirius Black. Things that were happening in the moment took priority and with Harry focused on all the life-threatening problems like the guards from a magical prison or a man thought to be a mad killer turned framed Godfather, were all that Harry could think about.

Eventually, the school year ended and as Harry was on the train headed back to Aunt Petunia and Uncle Vernon, he remembered the small leather book that was currently resting in his trunk. With the option of living with Sirius gone like the wind, he could turn back to his other option that his father spoke about. He still had the chance to find family that would be better than the Dursley's.

As soon as he would get to the house and be alone in his small bedroom, Harry planned to reread the entry that James had written to him to refresh himself. Then perhaps he could spend his summer in the muggle world doing something worthwhile.

Sitting up straighter in his seat, Harry let a gleeful smile rest on his face. His father had simply said that he knew about a last name. Ukima or something like that. It was an odd name so while it could be a magical name, there was the chance that it was not.

Maybe his grandparents had been somewhere in the muggle world on the other side of the globe when they found a child with magical potential living in a place with no tools to help him. The muggle world was certainly larger than its magical counterpart after all, so it would not be such a big stretch of the imagination to assume that the odd name was simply from a different culture.

Harry reasoned that there would have to be something about the surname on a computer if it was indeed from the muggle world.

With such thoughts swirling in his mind, the train ride seemed even longer than it normally was.

Hermione tried to ask what had made him so happy as he sat in the train cart smiling off into space, but all Harry told her was that he wanted to do something over the summer.

She offered to help once he said he planned to do research in the muggle world, but Harry told her that he wanted to try on his own first. He promised her that he would tell both her and Ron about everything once the next school year began, or better yet, when they would meet up for the Quidditch World Cup.

Simply rolling her eyes with a fond smile of her own gracing her lips, she gave a nod before she turned back to the book in her lap.

Once more however, it was not to be and Harry's plans to find his new extended family were put on hold.

When Harry got home, he noticed that the list of chores seemed to be longer than usual. To appease the Dursley's, Harry thought it would be best to prioritize the list and hurry through them. Trying to find a silver lining as he completed each task throughout the following days, Harry made himself read the entire journal nightly before he went to sleep.

After the first week back came and went, Harry was confident that he could recite the entire book word for word.

The chores still took up his time and to distract himself, he even started speaking the entries aloud when he was out in the back garden. He would get the occasional odd look from the neighbors when they would peek out from their windows and he made sure to keep quiet anytime he heard his relatives moving about in the kitchen when the windows were open. Even with these restrictions and the caution he was taking, Harry was happy to do anything to distract himself from all the tasks he had to do throughout the days.

Harry finally got his chance to escape from his aunt one day when Uncle Vernon took Dudley to lunch and then the cinema as a day of father-son bonding.

With only the two of them in the house, it was not too long before Petunia decided to leave to go shopping in the city. Wanting to spend as little time around her nephew as possible, she happily left with the threat of expecting the house to look the same when she got back.

With a quiet nod, Harry watched her take the second car and as soon as she left the street, Harry wasted no time leaving the house as well and walking to the local library.

.

.

He was disappointed to learn that the computer held practically no information on the word Uchiha.

There had only been one result that came up after he hit the enter key and excited to have even anything show up, Harry had checked out the result only for it to lead to an odd website about conspiracies.

It was a thread of conversation between a handful of people talking about how there was supposedly an entire continent hidden behind some type of force field that no technology could get past. Even within such a strange thread from a strange search result, the word Uchiha came up only once on the entire page.

As a reference to the hidden landmass and "facts" about how these people just knew this missing continent had to be real, someone said that there was proof from real accounts of people leaving the place and telling tales about living there. One of these people was apparently an Uchiha.

Harry had been excited to read about this so called Uchiha saying anything about where they came from, but it did not go into detail.

It was just a listing of names of people that had apparently came from there and it simply included an Aina Uchiha, whoever that was.

At first, he had assumed the entire thing might have been related to magic. There was an invisible continent being talked about after all and Harry knew a bit about being invisible thanks to his father's cloak. But the longer he thought about it, Harry was not so sure.

Was it even possible for magic to hide an entire Continent? He knew that Hogwarts apparently had some type of magic that stopped muggles from finding the castle, but the thought that an entire landmass could be hidden seemed like too much.

But who was Harry to argue – he had only been in the wizarding world for three years now. He was sure that there were still some things in the magical world that he did not understand.

Taking the time to read through the entire thread, Harry learned that the missing continent, while hard to accurately locate due to obviously being hidden, was somewhere in the Pacific Ocean.

Some smart people (that Harry could not quiet follow along with) talked about math equations and physics, showing various graphs and pictures to argue how there were weird spikes and fluctuations in science-related things that were coming from apparently nowhere in the middle of the Pacific Ocean.

While most likely in the middle of the large body of water away from other landmasses, the people in the thread said that when people came forward claiming to be from this long-lost place, they seemed to have more Asian influence than any other continent in both language and physical features.

This little bit of information seemed to make the accounts even more real to Harry since this matched up to the journal entry. James had said that his parents found him on the other side of the world, and the middle of the Pacific was as far as one could get from Great Britain.

The consensus of the people that posted said that this hidden continent seemed most likely to be along the equator line and below the Hawaiian Islands.

There were a bunch of arguments about the accuracy of this theory and Harry thought all the arguing and math equations were too confusing to follow for someone like him who only had muggle education until he turned eleven.

He was not sure if he could believe them, but it would still be a good idea, Harry supposed, to note it down just in case.

When Harry thought that he had gone through the entire web page as much as he could, he went back to the search bar and tried to put in the other surnames that had been mentioned alongside Uchiha. He tried a few only for the search bar to either produce nothing or a whole bunch of results.

At first, Harry seemed excited to have found something, but he soon found out that the surnames that came back with a lot of results were common words from Asian cultures and the results were from the originating countries like Japan or China. There were no ties or mentions of these words also being used in some mysterious missing continent.

If a name came back with no results, the only thing that appeared was the original thread that Harry had taken the names from. Slowly giving up hope, Harry typed in the final surname that he had taken down and hitting the enter key once more, Harry was surprised to see two results appear.

The first was obviously the original thread page but the second one was completely new.

When Harry clicked on the link, it took him to a type of public personal journal. The key word that lead Harry to the page stood out as highlighted text, Nara, and littered the entire computer screen as the name was referenced quite a bit. Shocked, Harry scrolled back to the top of the page to start from the beginning and as he moved further into the website and looked at different entries to the personal journal, the young teen began to believe that there really was a hidden continent somewhere in the Pacific Ocean.

The site was created by some woman named Nicole Martin from Canada that decided to write down the stories that her great-grandfather had told her about.

For the past six years, Nicole had decided to upload his tales because she found them fun and wanted to share what he had told her. From the way everything was written, Harry could tell that Nicole did not believe anything that she had written down to be real and instead thought they were tales from a great story teller.

Instead, she spoke about how her great-grandfather, Fumio Nara, had told her tales of a mysterious land that had amazing, mystical powers. The stories were told from his perspective, but it was obvious that Nicole did not believe that a ninety-three-year-old Fumio was the person that had experienced everything he talked about.

Harry knew better though.

He had experienced the unexpected when he was invited to Hogwarts and when he read his father's journal. The young raven was now completely open to the idea of a hidden landmass.

The most important thing that stood out to Harry was how in the last few entries, Nicole began writing about how something had apparently happened a long time ago and Fumio had somehow been sent out of his world and landed outside of a barrier. He had been found by some passing fishing boat whose sailors had thought he had been a survivor of a wrecked ship.

Fumio had also spoken about fighting and being in a war. As the last entry ended, Harry read that Nicole and the remaining living family members thought that Fumio had most likely fought in a real war and either had developed these stories to cope with what he experienced or that in his old age, his memories were fading and were being replaced with grand fairytales.

In the end, Harry finally got to the last post on the website which was dated three years ago. Fumio had apparently lived to be ninety-nine and had finally passed away. With no more tales to share, Nicole was done adding journal entries.

She said that Fumio's last words had been him wishing he could have spent more time trying to find a way to get back "in" so that he could go home once more to tell his younger brother that he had lived through the "transportation" and had made a family of his own.

Harry was sad to read that the old man was gone but was determined to keep going.

He tried one last time to search for key words that might bring him more information. He realized that he had been exceptionally lucky to even stumble across these two strange internet results, but Harry was greedy for more.

Yet, no matter how much he tried to be creative with his words and phrases, nothing else came up.

With that, there was nothing left to search for and even if there was something that Harry wanted to look up, he realized that it was getting late as he peered at the clock in the corner of the screen.

Worried that he might not be the first one home if he stayed any longer, the young teen decided that it would be best if started to head back to the house before he could be found out and be punished with even more chores.

.

.

With some type of lead finally made, Harry was happy throughout the next week of chores. They were never-ending since every time he told his Aunt and Uncle that he was done, a new list was shoved into his face.

It was frustrating, but at least it gave Harry a bit of time to go over everything that he had learned and mentally sort through it.

Harry hoped to find another opportune moment to leave the house a second time to go looking for more answers.

He could admit to himself that he would not know where to start, but at least trying to look somewhere with a lot of information would be something. Harry was even tempted to ask Hermione for help seeing as she had more knowledge about technology and the muggle world in general, but he stopped himself every time. It might have been a pride thing, but Harry felt like he should be doing this on his own – it was his family after all.

With nothing else taking up his thoughts, all Harry could ever think about were his mysterious relatives that lived on the other side of the world. What are they like, Harry would wonder. Would they look like him?

People did always say that Harry looked like his father. But everyone always said it was the famous Potter blood. So perhaps his looks were because of the blood adoption. Maybe I should go to Gringotts after all, Harry reluctantly thought to himself.

The green-eyed teenager continued to let his thoughts surround the mysterious Uchiha until one night he had a nightmare about Voldemort, Wormtail, and a third man that he did not know living in some old, creepy house.

Priorities took place again, and Harry was left thinking about his fleeting dream for the rest of the early morning until he went down for breakfast. There, he was met with an angry Uncle Vernon and that was when he was handed the hilarious envelope that was covered in nothing but stamps.

It was from Molly Weasley inventing Harry to the Quidditch world cup. He eagerly accepted the offer, wanting nothing more than to escape the Dursley's early.

Once more, a whirlwind of events happened to young Harry.

The Quidditch game had been amazing, but the after party was less so. Death Eaters attacked and afterwards, too much things began pilling up on Harry's plate.

His fourth year soon began after that and with the excitement, both good and bad, concerning the Triwizard Tournament, Harry Potter had no time to go looking for a mysterious continent on the other side of the world that may or may not have held his missing family.

End Chapter One

Notes:

I don't want to seem rude, but there is something I need to say right off the bat. This first chapter is to test the waters and see if there are people out there that want to read something like this and if this is even something worth continuing to write. I am a bit passionate about this project, so I might post the second chapter as well to get the ball rolling, but I don't know about the future of this story.

There are other stories that I am currently writing but this has been in my head for a while and I really wanted to write it down and put out the first chapter to get peoples thoughts and impressions.

If this does gain a bit of traction, then I would like to say ahead of time that I will focus on this story later. Like some time in 2019 later. I will want to write out some of the story to get ahead and fill this story out before I come back to posting. I'm not too sure how long this will go also, so maybe that is why I will want some time to think about this story.

Also, sorry about such an information dump here and about the lack of actual crossover. I didn't mean for it to be so much like that, but my hands just wouldn't stop!