Theory:Hiro Nakamura

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The following fan theories are about Hiro Nakamura.

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Theories

Theory	Citations	Notes
Hiro's powers resulted from mutations in his grandfather's DNA. These mutations were caused by the atomic bomb dropped on Hiroshima.	Hiro's grandfather was a survivor of Hiroshima and died of cancer. (The Crane)	- In an interview, George Takei strongly implied that Takezo Kensei is Hiro's ancestor. He says that through that legendary samurai, he is bringing a lot of good DNA to this role. This means that Hiro's DNA mutations were obtained from Kensei, not the atomic bomb. + Takezo Kensei didn't turn out to be much of a hero after all. - This could be because of Hiro's manipulation of the past (kissing Yaeko). - There have never been any documented cases that mutations from exposure to nuclear energy has been passed on to offspring. + As long as something was changed in the gamets, it can be from the radiation. • This is generally baseless, or at the very least a stretch. As to Hiro's powers coming from Takezo Kensei, his ancestor, it's possible, but I don't think that he produced any offspring while in Japan.
Hiro did not kill Sylar because he used Ando's sword.	None.	+ Isaac's comic showed Hiro stabbing Sylar with the Kensei sword. + Isaac's paintings did not always come true because of changes made by the characters. - Isaac's paintings give little context to what they show. The comic shows Sylar getting stabbed but not necessarily killed. It may be that the comic never meant to foretell Sylar's death.
Hiro's powers have not fully developed. When they do he will be able to summon anything from anywhere to any point in time.	None.	+ Many of the powers take practice and time to develop. • Future Hiro did not display such an ability. Had he possessed it, he could have brought Future Peter to him and Ando, rather than traveling to Las Vegas, or simply summoned present-day Hiro from the Homeland Security building. He may have not fully developed his powers in the period of five years, however. • Matt Parkman also did not display the full extent of his powers in the dark future. This may be from not meeting his father. + Future Peter, who is considerably more experienced with space-time manipulation, was able to teleport Matt to Africa seemingly without actually going there himself. - Hiro already seems to have done this, moving Adam in and out of his coffin.
In time, Hiro will be able to travel to a time and place by focusing on a picture of it.	None.	:+ In Genesis, Hiro is looking at a picture of New York and the next moment he is there.
Hiro did not actually change history when he time-traveled to ancient Japan; events as they are unfolding now are exactly the events that occurred in the first place.	None.	• This is a predestination paradox. + In the stories that Hiro was told by his father, Kensei was Japanese, (like Hiro) not a gaijin. It seems he was destined to return to feudal Japan and become the hero. - However, Hiro's first interference in feudal Japan is to disrupt Kensei's planned ambush of the bandits he was hired to protect the village from. We see that this action is directly connected to Kensei receiving his famous sword and meeting the swordsmith's daughter (who was angry at him only for abandoning the village to it's fate, which was Hiro's fault). It seems fairly probable that before Hiro's interference, it was indeed this incident that set Kensei on the path to heroism. Indeed, Hiro himself points out that he 'broke history'. + Yaeko told Hiro that everyone will know the story of Takezo Kensei. She likely took license to make the story the way Hiro remembered it. Plus, in her mind perhaps, Hiro still saved Otsu as the story originally said. + The "Battle of Twelve Swords" fits more into the context of Hiro's time-stop ability than Kensei's regeneration; if Kensei had gone into the battle, it is unlikely he would have simply disarmed the opponents. - Hiro never indicated that the original Kensei simply disarmed his opponents (except by doing it himself.) + This could explain why the depictions of Kensei in the Sword Saint documentaries looks less like Kensei, and more like Hiro. - Hiro had already been shown in 1671 (How to Stop an Exploding Man) when Sword Saint was released. + If a time traveling man in the future goes back to the past, then the present man would already see the changes his future self made in the past, considering they took place in the past. Basically Hiro, before he went to the past, would have to be living in a world in which his future self already ‘altered’ the past, because it took place in the past and would have already happened. So throughout Hiro’s entire life the events that took place with Hiro in the past, had already taken place, and all the effects of that would have already been weaved throughout the current timeline before Hiro even decided to go to the past.
Every time Hiro time travels, he causes a catastrophe such as the bomb that explodes in New York and the plague that Peter and Caitlin saw.	None.	+ In the graphic novel String Theory, it shows he went back in time to stop Sylar from getting Claire's power so he could be killed. Doing so may have made Peter the exploding man instead of Sylar. - In the Five Years Gone timeline, Nathan, or Sylar pretending to be Nathan, told everyone Sylar was the bomb, when it was actually Peter. This could have happened in Future Hiro's timeline. + Hiro teleporting forward in time prevented him from stabbing Sylar in the explosion future. + Hiro made it worse when he accidentally teleported to feudal Japan. There he met his childhood hero Kensei/Adam. He couldn't believe Adam was a drunk, pillager, and only thought of himself. So he turned him into the hero he read about but he betrayed him by kissing his princess. During the fight and before the explosion, Adam told Hiro he would pay for what he did. + Bob said Adam was the first and he said Adam wanted to help the human population by ruling them through enslavement and punishment (or something to that degree). Maybe if Hiro hadn't gone back to Japan and met Adam and then accidentally betrayed him, none of the future Peter and Caitlin saw would exist because Adam wouldn't want to seek revenge for hundreds of years. Adam may always have been the one responsible for the release of the Shanti Virus on the world. If Adam can heal from the Shanti virus, then Adam would have nothing to fear from an outbreak. - One of the side effects of the Shanti virus is the inability of evolved humans using their abilities. Thus, Adam would not be able to use his power if he came in contact with the virus. • In the episode Truth & Consequences, Mohinder finds out that Claire's regenerative blood is a cure for the virus. So that means Claire, Adam, and maybe Peter are immune to the effects of the virus. • Claire's blood is only a cure for the virus when combined with Mohinder's antibodies. It is possible that someone with the ability of regeneration could resist the effects of the virus much longer than someone without it (as it is not explained exactly how the virus negates abilities; if it is damaging whatever cells are responsible for powers, constant regeneration may be able to hold it off, possibly indefinitely, in a "dormant" state), but unless we learn more about how both the virus and powers work, it is impossible to say whether Claire, Adam, or Peter could survive. Adam tried to release the virus in the present-day, in spite of this. • Claire's blood and Mohinder's antibodies were the cure. - Hiro has time traveled many times without causing any such events: going back to save Charlie from Sylar and failing, trying to capture Usutu.
When Hiro bumped into himself as a child he created a rift which will present itself later in Volume 3.	None.	+ Touching a previous version of yourself is a paradox which may well cause a rift. - Mere contact (physical or otherwise) with a previous version of oneself wouldn't necessarily cause a paradox. Only contact which would alter events in a manner which would prevent the contact would do so. This contact could have altered some events, but likely not enough to prevent the present Hiro from going back in time and making the contact in the first place. - Dark Future Hiro didn't seem to consider that when he was about to send his past self and Ando back to their present. + He might not need to touch an object to teleport them.
Hiro can travel between universes.	None.	+ Hiro has gone to futures that did not happen. They could be futures of alternate universes. - It is possible that the future that he visited was a product of him being "out of the equation" as he was able to prevent Claire from being killed, but didn't stab Sylar (as he wasn't there in that timeline). - Technically, he would still be out of the equation until he reappeared in the future. Therefore, it makes no sense how Future Hiro would still even exist.
Hiro Nakamura is brothers with Sylar, Nathan and Peter Petrelli.	We don't know who Sylar's father is, so he may be Arthur Petrelli, while Hiro's biological mother may actually be Angela Petrelli, since we know she slept with Kaito Nakamura.	+ All of their children would have similar abilities as well; Sylar (intuitive aptitude) and Peter (empathic mimicry) are related, while Hiro (space-time manipulation) and Nathan (flight) are also very similar. - I don't think flight and space-time manipulation are similar, also Hiro seems younger than Nathan. Mrs. Petrelli having a bastard child like Sylar before getting married and having two kids makes sense. Giving birth to an Asian baby would probably have wrecked her marriage. Nathan would remember his mom being pregnant with a second baby. - Nathan was not born with a natural ability. His ability of flight is synthetic, meaning that any "similarity" between flight and space-time manipulation is purely coincidental. • These four characters seem to interact and affect the future far more than any other character in the entire series. + In the episode The Butterfly Effect, when talking to Sylar, Angela Petrelli says to him that she is his mother. - Hiro does not look anything like Peter, Nathan or Sylar. + He could be only their half-brother.
Hiro will save Elle.	None.	• Sam said the courier fanboy would have the last story of 9th Wonders. The story might revolve around the birth of Noah Gray. Given the current position Elle is in, Hiro is the only one who can help her.
Hiro (in his 10 year old mind) will remember meeting himself when he used to be 10 and therefore create a paradox.	None.	+ It would defy the rules of the Space and Time. - How would that create a paradox? How does the fact that he has the mind of his ten year old self make any difference? That's not a paradox, and there is nothing contradictory about it. An adult Hiro, with the mind of a ten year old Hiro, remembers himself who time travels and bumps into his ten year old self. There is nothing paradoxical about that. Secondly how would he remember that? He has been shown to have no memories of his older self.
Ando used the formula to gain his power. Since he couldn't time travel, he looked for someone else who gained the power of time travel by using the formula. He enlisted the help of that person, in going back in time and bringing his friend Hiro to the present day. Then he used the formula to give Hiro his powers back. Hiro then travelled back in time to steal his father's half of the formula and destroy it, in a desperate attempt to stop Arthur. When Hiro finally came back to the present day with his father's formula, Ando realized that if the formula was destroyed, he would never have been able to bring Hiro back to the present time-line. Desperate to save the formula, Ando shot Hiro, accidentally killing him.	None.	+ Hopefully, that unfortunate conclusion can be stopped by an aged version of Hiro, who lived to the present day, which would explain why two of the writers were fired for writing messy time-travel stories!