When I first started writing, I always knew Naruto was going to get the technique and that I didn't want it to just be instantaneous teleportation. That presented problems for my grounded/rational/pragmatic mind. It's obviously an incredibly powerful/useful technique to have, so, among many other thoughts, my weird brain wonders, "why doesn't everyone have it?" I assumed it was because it's ultra difficult to use, or he'd be using it everywhere. If they can teleport a whole damn army in canon, I imagine a surprise attack against any village would be so easy to plan and execute. Danzo would have a field day with this technique. SO obviously this tech needs restrictions, chakra being the most obvious, but it needed to be more than that or else anyone with high chakra can use it.
Kishimoto said its space time jutsu, so, as a huge fan of Einstein and the movie Interstellar, I thought I'd dive deeper into the mechanics of how the Flying Thunder God jutsu might work by applying physics, general relativity, and time dilation. That was easier said than done. I really really wanted to get this right but I am NOT a physicist. Still, figuring out the mechanics of time dilation gave me several good restrictions I can add to the jutsu, making it perfectly reasonable why it's not constantly spammed.
I'm bringing in more of an altered Universe now and I can't wait to get to it, BUT, I may not be able to update for two or so weeks. I do apologize for that. Usual life stuff. As always, thank you for your support, for your patience, and taking the time to read. Please, let me know what you think. I'm always happy to read them.
Have a great one,
-Grae
Hey, guys,
This section is to address understandable comments on my attempt to rationalize the Hiraishin no Jutsu, aka, The Flying Thunder God technique, aka the Flying Raijin Jutsu created by the Second Hokage Tobimara Senju and perfected by Minato Namikaze.
JUST A REFRESHER::::The jutsu itself is explained as instantaneous teleportation by creating a pocket dimension the user immediately passes through regardless of distance or nearly any other restrictions you can think of. The only requirement necessary is marking the intended destination with the mark. In canon, it's shown that this mark can be placed on damn near any surface, including other people's chakra and it can't disappear(unless the story needs it to *sigh*). In canon, they can teleport the user and something else, like an item, or a person or an entire army, or they can simply teleport an object/person without the user of the ability needing to go too. It can also resist the pull of Kamui. Other than Tobimara and Minato, the trio of Genma, Raido and someone else can use a variation of the technique which involves a special formation.
The Hiraishin IS NOT the Body Flicker. They are fundamentally different even if they look similar. Tobimara made a point to mention during the war arc that Minato was faster than him; that's in reference to the flicker, not Hiraishin.
Plain and simple, this jutsu is insane, and with my imagination, there's no limit to its use. If I kept it as is, there would simply be too many plot holes moving forward. Nearly any situation can be fixed with Hiraishin in some way, shape, or capacity, and I don't know about you, but I find that boring. I understand the wow factor about it, but after the wow passes, you then have to figure how Naruto doesn't end every battle in an instant. Not to say my Naruto won't use it in battle, because he will, but with limitations. It won't be an auto cheat code.
ON TO THE TECHNICAL STUFF
There valid points that I'd like to address.
First, the user of the jutsu is NOT traveling at the speed of light or near it. He's moving faster because the contract seal uses space/time calculations to create/program time dilation. It just so happens that time is connected to space which incorporates mass which of course incorporates gravity. And it's the gravitational force that propels the user through the link.
This of course can't happen in real life. The gravitational force alone would pull a person so hard they'd stretch like spaghetti and hopefully they'd be dead before that. I figure since this universe has chakra and chakra can do just about anything(they're sealing giant spirit monsters inside people and doing other insane stuff with it), I don't see why it couldn't withstand the gravitational force. Speaking of, the use of chakra within the link is basically the brakes, so the user doesn't go too fast and pull like 30 g's of force. The contract only stipulates the user and whatever the user decides will be transported, so just because someone is standing next to the 4ths kunai doesn't mean they'll experience the effect.
Also, I'm not planning on using the jutsu for anything more than transporting from one location to another, whether within battle or across vast distances. So, he will not be punching someone at near the speed of light/within the activated link. I understand that amount of energy would vaporize the atmosphere, rip apart atoms, essentially destroy the earth. Naruto will just be traveling.
Lastly, I'm not done explaining the jutsu. Naruto still has to train with it and that's going to shed more light on the rules than one short conversation with his father had. I try to explain as best I can within the narrative. I don't spoon feed information, so if a character doesn't have a justifiable reason to ask, or their thoughts don't need to think about it, then I don't write it. It's a flaw, I know, but, meh...
THE WORMHOLE ANGLE
Truthfully, I didn't even think of making it a wormhole. It's called space/time in canon so I just went that direction. I think wormholes can definitely work but it has its own issues as well. It would teleport the user or items/people/armies, but Tobimara has a sword attack using the hiraishin and I don't know how that would work with a wormhole. Also, part of the problem that canon doesn't even bring up is the mental disorientation from beating an entire army with the hiraishin. If he's passing through space instantaneously, his mind could only process flashes of reality, like watching a moving with three or four frames cut out. Not that it wouldn't work, but I think if I had thought of that, I wouldn't use it. Also wormholes are purely theoretical. Time dilation is proven. Also, just because it wasn't shown, doesn't mean someone can't grab a user as they teleport. It's a possibility that I don't want to deal with later.
I think that about covers everything. I do apologize for the unnecessary confusion. While I don't feel quite as in the zone as I did before summer, that shouldn't be an excuse. I'll get there tho.