u/Open-Leader3010

From what we see, Kaneki turned into Dragon after consuming an absurd amount of Washuu kakuhou. The whole thing is just a kakuja that could technically be formed by any ghoul if they ate that much.

Before the medical advances which enabled kakuhou farming, Quinxes, Oggai etc., the only circumstance that would make Dragon possible would be cannibalizing actual Washuu ghouls, which could only happen if the previous OEK was winning.

This could explain the many half-humans, the polygamy and the obsession with becoming human that the Washuu have. There's also that line Tsuneyoshi gives to Nimura, about his shortened life being a result of "their ancestor's sins" and how the 24th ward children call their city Tokyo.

I don't see how someone could have buried the Underground King with that era's technology, making it more likely that they just built a new city and called it Tokyo for continuity reasons.

I was doing some research for a fanfic I'm about to write, and was looking into the details of how Narukami works. We know the basics, Sword Mode and Electricity Mode, the blade becomes 4 (technically 8) panels that help conduct and guide the electric Ukaku shards from the kakuhou that is presumably embedded in the funnel that doubles as a guard. See Image #1 and #2 for reference.

Now, I had a number of mundane questions about how this realistically works, with the switching and all that, that I'll skip for now (answered at the bottom for anyone who wants to use them for their own fics). One thing that struck me is that Narukami looks very blunt, its not just flat but thick too. I struggled to see how it could cut anything, much less the Owl's Kakuja arms, which should be Koukaku kagune given that they spring from below the shoulderblades.

Here was the first shocking revelation:

Narukami's blunt appearance and lack of a tip are conscious decisions. Numerous swords exist with the same design philosophy, where the rectangular appearance and flat end actually contribute to the cutting power of the sword while losing out on thrusts... Those are called *Executioner Swords*. See images 3 and 4

Arima is the *White Reaper* and his main weapon is an Executioner's Sword, and not only that, but this edgelord has 4 OF THEM stacked 2x2 and held together by magnetism. As a reminder, the number 4 is considered unlucky in Japanese since it can be pronounced as "shi", meaning death. Even symbolism aside, 4 of those blades together could take the head off a bear let alone a human being.

As if that wasn't cool enough, here's where the real aura farming begins.

We don't have much hard info on the dimensions of this quinque or the physical properties of quinque steel, so you'll have to bare with my somewhat basic assumptions and guessing.

Narukami weighs 15kg (33lbs) at the least and somewhere definitely above 30kg realistically(64lbs). Like I said, these aren't sure figures but using some basic comparisons to Arima's height, the type of sword it is and considering quinque steel as basically just better, lighter steel. The 15kg minimum is what I got if we assume that only the outside edges of Narukami's sword mode are real quinque steel with the inside being some sort of super light extra RC infused steel. The second, heavier calculation is more reliable.

For comparison, the heaviest swords we puny humans wield two handed are greatswords which come in at a 3-5kg weight. Narukami is Arima's offensive option, while IXA is his defense, which means most of the time he's holding and swinging it one-handed. That's insane.

The pistol-shaped hilt/handle is doing some work there by shifting the center of gravity and letting him use his arm and shoulder to hold up all that weight at the cost of some wrist mobility (which doesn't matter anyways since Narukami has no sharp tip to use it like a rapier). But that's still an insane amount of strength on display before we even get into the physics of cutting with it.

Narukami is definitely Arima's signature weapon, and we have a good reason it wasn't passed on like Yukimura, considering no one who wasn't a ghoul or half-human prodigy like him could even handle it. It also shows off the intelligence of the person designing it, both in-universe (the handle design and lack of point synergy) and outside it (the weapon fitting Arima's theme).

Oh and one last thing, swords of this type were used in a very specific way. An executioner's move to efficiently cut through the neck without mangling the victim was to use the Zwerchhau cut which is a horizontal cut done at roughly shoulder length, using hip rotation for extra strength. And would you look at that, Arima uses exactly that identical move to defeat both Eto and Kuzen's Owl kakujas. See Images #5 and #6