What is Sukuna's Black Box? | Jujutsu Kaisen 

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"oh, that's right. i thought you'd know about this, but i suppose a cursed spirit wouldn't."

Cleave and Dismantle= how he filets/prepares his food. Fuga fire arrow= how he cooks his food. Giant second mouth= how he eats his food. Uraume= how he preserves his food. (Freezes leftovers and knows good recipes for human, apparently.)

I think it's a box that's potentially black

7:25 no wonder Sukuna has been killing everyone, hes the original MC.

The moment when Sukuna says "Fuga" (Open) again in the manga is gonna be legendary

I respect the amount of restraint it must take Gege to not explain it. Its one of the things that keep me engaged until I know. The Fuga chant is orgasmic.

Sukuna ‘eating’ also means he’s fighting his opponents getting a ‘taste’ of their unique flavor (cursed technique). That’s why he fights passively because he wants to enjoy his ‘meal’. ( there’s a way better way to say this but I hope you get the point lol)

Probably the best theory I’ve heard so far.

i feel like sukunas technique revolves around an actual kitchen and what goes around in it. cutting and heat are both integral to any kitchen. uraume also has the ability to freeze stuff which is also used in kitchens to preserve food which probably adds to why they’re close to sukuna. Sukuna fighting philosophy is probably like same way how powerful people enjoy food. finest foods (strong opponents) should be remembered and savored while anything below that you can forget

This would line up with the oddities surrounding yujis technique. It’s possible yuji actually has his own shrine, and that he ate the remaining death wombs to obtain blood manipulation.

I think you finally cracked it. This is the MOST plausible theory so far.

This was exactly my theory as well! Sukuna is always referenced with "eating" and "storing/opening boxes" that I thought he might as well eat sorcerers and acquire their CT and store it for his own use! Fantastic vid 👌

I absolutely agree with your theory, but here's my interpretation: Sukuna's CT is literally just the embodiment of eating. That's it. The dismantle, a cut where it depends on how much CE sukuna outputs into it, is the same as how people used to cut food with knives in the past, and how the effectiveness of the knife depended on how hard someone uses the knife. Cleave is just someone biting through his food. You might ask how this correlates (since it's not as obvious as dismantle) but hear me out; when you bite into anything, do you CONSCIOUSLY choose wether to bite really hard or really soft? No, you automatically do that depending on the toughness of your food. If you're eating ice cream, you don't just cut down on it like steak instantly, no, your brain automatically tells your teeth not to bite hard. This concept is the same as cleave's concept, where both adjust themselves depending on the toughness of whatever you're fighting/eating. The fire arrow is just....fire. Fire is used to cook food, hell, it's THE reason why we CAN eat food. It has existed for so long we don't know when the first human used it. The "open" part, though as not dramatic nor complex as the other points, may just be a chant, like how most people need to yell out their move before attacking. This can be compared to Gojo's "Hollow Purple", since it's the strongest attack in his arsenal, a chant may be needed for the technique to work. . . . Anyways, sorry for all that yapping lmao. Those are just my thoughts, what do y'all think? (What follows after this sentence is a "debunk" to Sukuna's technique "storing" other cursed techniques. Its also an edit lol) Also, anotha reason why i dont think "shrine" is a "storing technique", is when he used 10S against yoruza. Considering how close/knowledgeable yoruza of sukuna, she definitely would know that sukuna's technique is a storing one. (Hell, shes the one where we get the name "shrine" from.) Now heres the kicker, if sukunas cursed technique is about STORING other cursed techniques, she wouldn't question why he didnt use "shrine" against her, but she did. If she knew "shrine" stored other techs, she wouldnt question why sukuna didn't use that same "shrine" against her, but she did. (Edit 2:Well, depending on which translation you view it from, you would say she KNEW that 10S was megumi's technique, but my theory still holds up hecause if sukuna's technique WAS actually about storing other techniques, then she wouldnt tell him to "use "shrine"". Sorry for the extra EXTRA yapping session lmao)

Broooo YOUR INSANE IT FITS SO PERFECTLY LIKE EVERYTHING MAKES SENSE LIKE YOUR A GOD

I agree, he tried to eat angel afterall. Maybe his cursed technique stemmed from people offering prayers for wrong reasons like hatred as in literally cursing someone to die, as it is a shrine that physically manifests into reality, could mean his shrine literally existed before.

This just adds to the list of direct similarities between Sukuna & Rika / Yuta since he gets his abilities from Rika. 1) King of curses / Queen of curses 2) Only characters who RCT heals people 3) (If shrine stores CT) Both Rika & Sukuna store CT within themselves like a storage 4) The requirement for storing CTs is eating parts of people (Confirmed with Yuta eating Sukuna’s finger) These are to similar to be coincidence & what’s even crazier is rika was created by how strong yutas love was for her, love being a key topic in Sukuna’s story.

Having fire on top of slicing makes sense. Afterall a chef has to cook the meal after the ingredients are prepared

To add to the “Cooking” theme, the original word for dismantle (Kai) is a cooking technique. Specifically it refers to the techniques for preparing fish for Sashimi or Nigiri Sushi. One of the knives shown in the Manga when discussing Cleave and Dismantle during the Shibuya Malevolent shrine looked very similar to a yanagi ba, the single bevel knife used for cutting Sashimi. Fun tidbit: the famous Kitchen Knife brands Shun, and Seki Magoroku, as well as Kershaw USA pocket knives, are all owned by a conglomerate known as the Kai Group (Named after the same cooking technique as dismantle).

I feel like sukuna and his weird black box is sukuna finding a way to have multiple techniques. Only two people have multiple cursed techniques, which only happened because their native technique let them do so. Maybe there’s a way to combine two techniques into one technique, bypassing the general rule of not having multiple techniques by just forcing multiple into one?

Yorozu isn't the only one that calls Sukuna's CT a "Shrine". When Higuruma fought with Sukuna, when he talks about possible target of "Confiscation" he refers to Sukuna's orginal technique also by name "Shrine". Maybe Angel also shared some information about usage of "Shrine" to Jujutsu Squad(refrerence to S*icide Squad and you know why :/ ).

THIS AGED SO WELL 🗣🔥

Man I just love your videos man you the only reason i’ve been able to keep up with jjk

this has been my personal theory for months and months now, you read my mind. great vid!

Best video yet, appreciate your hard work.

This was actually pretty informative.

for sure one of my favorite content creators

Excellent research bro... I love your channel best breakdowns ever of JJK and you get str8 to the point. Keep up the great work bro!

This was a full on banquet, thanks my guy

I’ve seen this theory around for a while and I’ve never been fully on board with it until the very end of the video where you brought up the comparison between yuji also eating to gain power. I think that detail alone lines up too perfectly and I’ve never seen that comparison brought up before. Sukuna’s technique reveal is gonna be insane no matter what it is

When you said "so y'all did I cook?" That was cold. Great video, props man ✊🏿

yeah you're going crazy on the theories bro keep it up

Thanks for the shout out and vid, you put everything together really well. I've been thinking that Yuji and Sukuna might share a eating technique for a while. I also think this is a better way for Sukuna to go "all out" as instead of just having a bunch of extra cursed energy maybe he just has more techniques he could use. It will be interesting to see if Sukuna will end up using Angel's technique since if he can then the story is doomed.

It could also be eating cursed tools, thus “storing” them in the shrine, cleave/dismantle are knives the fire arrow is an arrow etc.

Thanks for including that manga page of Todo. I haven't gotten to read it yet, and the wording he had was pretty interesting

I heavily respect your work

Thanks for finally nailing down the Black Box vs Black Square discussion as I see a lot of JJK RU-vidrs conflate them as the same time when the anime made it very clear when nothing was said

Fire 🔥 vid Fuga!!! 😂

I think the square is a reference to the square tattoo on his shoulder. There are 3 squares on each shoulder: adding up to 6. There are 6 humanoid skulls hanging on the roof of Sukuna's Malevolent Shrine. Those skulls contain Sukuna's fire. We know this because there is a color page with him holding a humanoid skull that is brimming with fire. I distinguish the shoulder squares form the rectangles on his back. The rectangles on his back correspond to the eyes of the bulls on his floor. Those eyes represent death; they look like Mahito's mirror. And thus the rectangles are dismantle. The center tattoos on his back are related to those antler like post with the unbloomed flower on top. Thus, the center branching tattoos represent life. So they branches are his healing ability. All his tattoos correspond to his shrine. The top of the shrine has a bullhead and 4 humanoid skulls. That bull is tattooed on his forehead, and those four skulls represent his 4 eyes or maybe his 4 extra eye markings that emanate from his extra eyes. His mouth markings represent dismantle. Aka his Trishul.

hear me out .. "open : pandora" would go hard in the anime

Allons-y dropped another really great theory on what Sukuna’s CT is and it’s crazy how similar y’all got it. I would kill to see a collab between you two doing some insane theories.

This guy is the best JJK content creator on RU-vid.

Could be Domain Open. Implying that the original domain “expansions” were all open domains and that one’s innate technique is their domain. Maybe they could only use curse energy in ritualistic places, like shrines. And shrines acted as sorcerers’ domains, where they can use techniques. Maybe this is how the sorcerer clans started

I've always thought Fuga (The black box) was an ability that every sorcerer was capable of because of the way he introduced it to the audience. I think its a technique like new shadow style rather than an inherited technique that has you condense cursed energy and work air into it to allow it to combust as Gojo revealed in one of the most recent chapters enviromental effects do have an effect on jujutsu. The way it's drawn looks much closer to cursed energy dyed orange and red due to extreme heat rather than Jogo's flames which is an actual technique and generates fire and lava. You can see Sukuna superheating his cursed energy before even saying Open which makes me feel like it's closer to New Shadow style that has you form contracts to use it (unless you're Kusakabe) or like reciting an incantation for a normal technique it just maximizes its efficiency or allows him to form the arrow from it like a heatsink. Gojo's Six Eyes didn't tell him any other ability besides Cleave and DIsmantle (the audience never really got told so I'm pullin) and when Yuta copied his technique recently, he used Cleave n didn't mention anything else. I think Sukuna just has a bag of sneaky or just forgotten fundamental jujutsu combat techniques nobody else really but like Kenjaku might've known.

Enjoying your videos 🎉🎉🎉

Yeah you cooked bro. I’ve had this theory ever since he made the fish analogy with Gojo. Love the videos and appreciate the more in depth attempt at your videos

This is actually cool. Sukuna having shrine would make sense and everything so far that he used works. A shrine has been used a lot for sacrifices in many cultures, and everything sukuna has used so far have been ways people have been sacrificed in history

Ive heard of this theory before but you managed to break it down so much better. Also want to point, when Yuuji goes into Sukuna inmer soul where they made the Binding Vow, that place looks like the inside of an animals stomach.... from the spine on top to the fluids below and skulls lingering throughout the shrine

Now that he's open the furnace we know that he was truly cooking in a malevolent kitchen all along

You cooked hard🔥

this dude guess it 💀💀

You cooked so good that kitchen is burning lol

this man is on the money

You cooked a meal better than Uraume ever could. Great vid

Yes that makes sense, I think yuji has already acquired Sukuna's CT but he isn't aware of it. And the reason why he is able to use blood manipulation is because he might have swallowed some blood of Choso's during his fight.

You absolutely cooked. It's just so peak. Amazing theory backed by character design hints. It also explains why Yuji didn't get the slicing technique of Sukuna yet.

You won another suscriber

You could also use his domain to support the cooking theory as it’s a storage with the entrances as mouths like a stomach related to eating

This is definitely one of your more interesting theories and a really interesting concept in this universe

Maybe he stores attacks? Something like, someone shoots him with Fire, now, he can "open" his shrine, absorb it, and use it as his own. Steling from others, thats something the KING of curses would probably do. Probably Cleave and Dismantle also where stolen from a powerfull opponent, or maybe his first stolen technique, and thats why he uses it so often. Or god don't want it... is his weakest curse technique stolen.

4:13 the data book has been translated into french ( i speak french ) and in it it says this "usually a technique only has one ability, but this one is an exception by having 2, it distinguishes itself by its power but also it's particularity, the target is instantly dismembered, cut into pieces and incinerated, only a small amount of adversaries can survive a technique like this." so maybe its some sort of finisher move, bc the only times we've seen him use it was at the end of the fight, reminds me of cremating a body tbh

4:11 I feel a good guess on what the black box is, is just a form of changing Cursed Energy, like making stretched out so thin that it ca cut anything or compressing it till it explodes into flames.

You're the best Jjk content creator. Keep with the good work dude, you're awesome.

There's been a lot of speculation on why Yuji hasn't inherited Sukuna's technique yet like Gojo said he would. It's possible he was wrong or that Sukuna wasn't in his body long enough for the technique to ingrain itself onto him, but if we go by the theory in this video that Sukuna eats people and then stores their techniques in his Shrine, didn't Yuji eat the Death Paintings to get Blood Manipulation?

7:30 Ooooh, so kinda like a 'CT hammerspace'? I would actually prefer if this was the case, rather than if he had full control over the process that we refer to as the 'black box'. Maybe how he gained his additional arms, eyes, and mouth were thanks to a CT that reshapes the soul like Mahito's idle transfiguration, but with obvious limitations. For eg. The process of reshaping the soul itself could be very slow with this CT, and there could also be a potential 'cooldown' to it as well. These limitations could be because of the CT itself, binding vows, or a potential 'nerf' that happens to CTs that he gains, with how he does so potentially playing a part in the 'nerf' that they receive. A hypothetical binding vow that Sukuna could've made here is one that allows him to consistently recreate his Heian-era body, whilst losing some other perks of this makeshift idle transfiguration CT. And assuming that he gains someone's CT by eating them as you said at 8:53, Uraume might know how to prepare these people as 'meals' in a way that makes it so that there either aren't any, or are very minimal limitations imposed onto the CTs after Sukuna gains them. And yeah, *YOU COOKED!*

What bugs me is that Yuta didn't have access to Black Box, suggesting that Sukuna's CT is solely composed of dismantle and cleave, so it may probably be a whole different cursed technique

Basically, Sukuna is evil Yuta, only he uses Shrine instead of Rika to hold the techniques he stores. This would also track with how they get their copied abilities, as Yuta has Rika eat a part of the enemy to gain their technique (eg. Sukuna's 20th finger or Uro's arm), while Sukuna just eats them himself. It's also possible that Sukuna started out with a similar level of cursed energy as Yuta, but he ate so many sorcerers that his raw power increased to the level he is today. Finally, it's possible that Sukuna is compensating for not having a Shikigami to store his techniques by using a binding vow that lets him use Cleave/Dismantle naturally, while every other technique requires him to select from the Shrine to use.

This was exactly my idea when I first saw that scene in the manga.

I'm just in awe about your interpretations... Right now I'm more of a fan of you interpreting the manga... Than the manga itself... 😅😅😅

with the inspiration from fate, this makes more sense, Gilgamish power is pretty much that same, many weapons, yet he throws swords (slashes)

Brilliant theory! Definitely cooked up Sukuna’s true CT

I think his cursed technique is “binding will” this would make the distinction between cleave and dismantle more obvs cleave is the amplification by literally producing 2 “binding points” the space between those two points is cleaved open and dismantle is the rtc of his innate technique much like gojos “red” with this technique it’s far easier to attack a wide area as the inverse of binding is cutting. I substantiate this with the revelation that yuji could only use the technique after a period in which he learned how to use rct and that domain expansions take after the innate technique over any sort of skill based technique you derive from your innate one basically if his innate technique is binding it would make sense that his DE was a shrine because a shrine could be seen as bondage for the divine in a sense as a result sukuna can use binding to do a full All For One and just yank out your technique and enshrine it

A few things (I'm bout to spout off so excuse me if I start yappin) 1. I think you are pretty much on point regarding the specific idea of the "Shrine" technique. 2. Techniques may be hereditary, but they are not originally genetic mutations. This is something of a pet theory of mine so bear with me for a sec. One of the first things we learn about Jujutsu comes from Sukuna, It's that binding vows are important and almost everything about Jujutsu follows from how this kind of equivalent exchange system works. They may be old, but techniques are likely just products of very particular, multilayered binding vows, and genetic inheritance of certain aspects of brain chemistry may have been popular as conditions that allowed these techniques to exist. Think of it like Hatsu in HunterxHunter. Powerful Hatsu can't exist without setting a restrictive precondition (or even several as with Chrollo's Bandit's Secret) to their usage. Similarly, most techniques in JJK are bound in their usage in very specific ways. Barring everything about barriers and domains being basically one giant extrapolation from this concept: the construction technique's extra energy cost, the ten shadows' shadow storage weight condition, even the limitless' uselessness without the six eyes on top of only one person being able to have the six eyes at a time, ever, etc. My theory is that every technique in JJK was originally a complex, multilayered binding vow made by one person and part of those many conditions were likely that anyone with a specific brain chemistry (a trait often inherited in families) could use the technique, or that only so many people can have the technique, or maybe that anyone who kills or eats the user can develop the technique. All this comes back to something key about Sukuna which we can extrapolate from both this theory and Kenjaku's explanation of his retaining of the techniques of his previous vessels, Sukuna's storage cannot be very large or contain some ridiculous number of abilities. In fact, it is very likely that part of the binding vow allowing the "Shrine" Technique to exist is a very specific restriction on the kinds of abilities it can contain. This raises the conundrum that Yuta Okkotsu may be an especially unique case, being able to store so many techniques, though that may be a product of the restrictiveness of the binding vow around his curse copying technique, whose conditions are: at least, that the window of time he is limited to for their use is very small (just 5 minutes with rest) as it's bound to Rika's full manifestation and the restriction of his access to his full cursed energy and any of the copied techniques outside of that time also contributes. Sukuna can call on the several aspects of the technique with just a chant, if that. It seems a lot less restrictive meaning the condition has to be something else, or there's something about the way it works which we're not seeing, and I think it's the former. 3. This is the best JJK video I've seen yet on this platform.

My personal theory is that it's a lot like Ino's CT. Ino can invoke different phenomenon with his CT and Sukuna can do the same. Sukuna has 4 powers in my theory. The first is cleave (dismantle is a off shoot of cleave). The second is fire. The third is water and the forth is his ability to eat. It's a kitchen so Sukuna must prepare the meat. Cleave. Then he must clean the meat. Water. Then boil the meat. Fire. Then eat the meat. Evil Kitchen. That's why i prefer the translation of Malevolent Kitchen over Shrine but this is just my guess.

I have a theory that has already been explored. Sukuna's cursed technique may be based on the culinary arts, he might be the ability to learn and replicate any technique related to cursed energy, similar to how a chef might learn and replicate various recipes. This interpretation highlights Sukuna's versatility and adaptability in combat, During fights with CT users, Sukuna seems to analyze and dissect his opponents' curse techniques, possibly with the intention of learning and adapting them. Sukuna's ability to learn and perform techniques may involve observing and replicating the flow of cursed energy used by his opponents. The Fuga chant is another example (it reminds me of a recipe book) we first see this against the fight jogo. Sukuna seemed to be toying with jogo during the beginning of the fight it was only at the end of the fight where sukuna uses fire arrow maybe he was analyzing the flow of jogos CE and sukuna being a natural talent when it come to CE manipulation was able to refine it. Another example of this is his fight with gojo, where he literally used mahoraga as a blueprint for his world cutting slash

COOOOOKED!

Until the end of time I will maintain the idea that Sukuna has Copy and Fuga is like Rika and holds his Cts

If we're going with the idea that Sukuna needs to eat someone to get their curse technique then wouldn't it be hilarious if Sukuna pulled out Jacobs ladder because he took a bite out of Angle

HE COOKED

Btw the italian localization calls Malevolent Shrine "Reliquiario Demoniaco" (Demonic Reliquiary/relic vault) which is very apt for the storage idea

What you cooked goes really well with the theory that Sukuna had a twin. Either that twin was HRed or Sukuna himself was. (His dire want to prove to Maki that honing your Jujutsu skill is better than honing your body

Aye you cooked tf up that’s gotta be what it is no cap😂👌🏾

Hi! Thank you once more for such a cool content you making! Unlike many, I really enjoy the last chapters of the manga where everyone work together, trying to joinly defeat the sukuna. The one I'm missing for the full picture is Hakari - but unfortunately he's busy with Uraume. I would really like to see Uraume fight too, but there is one thing that's been running through my head. Since we know that Hakari's domain is very fast and strong due to its unlethal properties, can we assume that it could overpower Sukuna's domain if Sukuna made it with a barrier. That is, would he have defeated Sukuna in a domain clash or at least been able to compete with him? It seems to me that this could turn out to be a very cool moment if Sukuna decided to lock everyone in his domain (or he could not cast a barrier-free domain at some point), to which Hakari would respond with his mega-fast domain and overpower Sukuna, once again surprising him . Of course, I’m not talking about this as a win condition, just as an interesting fact about Hakari.

bro CALLED IT

bro predicted

I think that because Sukuna’s knowledge about the soul When eating people He’s also consuming the soul since the soul and the body are the same and adding that to his own soul. Gaining the possibility to morphed in the way he is now. That’s why he has a bigger storage for curse energy and also could be the reason why jacob’s ladder didn’t work that much during Yuta’s domain. Because he ate part of Angels soul(arms) and she couldn’t recover them, that’s why his more resisten to the technique now.

You cooked with this one ngl

Manganimist teaching english comprehension 👌

I think that is something like linear combination, combining CT with CTR u can achieve different things and if u manage to get control on multiple CTs u can combine them adding subtracting and multiplying them

What if his technique works similar to ten shadows, at the beginning he only has cleave and dismantle which he can use any time but he has to get other techniques somehow and to active them he needs to chant "open" so he can get them out of storage/shrine

Open Malevolent Stove 🗣️🗣️🔥🔥!!

Don’t worry big guy, you cooked like an absolute madman in this one

The eating bit actual happens once more with yuta! Its hinted at the fact that in order to copy a CT, he or rika have to eat part of that person. Its why sukuna says that Yuta ate his finger when they're fighting. Also happens in his 1v1v1 where rika eats a part of Takako Uro and he seems to only then be able to copy her CT.

On the topic of Sukuna loving to eat, during the Mahoraga fight he’s eating popcorn and hates it so it makes sense he’s a food connoisseur.

really like this idea, it adds up why some default slash technique user could be so powerful

when you mentioned both his techniques are flame and slashes, it made me realize these techniques are related to cooking in the kitchen. maybe his whole arsenal are tools used in cooking.

In the newest chapter yuji can use the shrine too and he's sukunas nephew. Sukuna told jogo that humans would know about his flame arrow because it was famous. He uses his flame arrow against mahoraga too. It'll be awesome if we see yuji use the shrine and get the fire arrow.

The fact that yuji learned blood manipulation after the implication that he ate the other death paintings makes extremely convincing. But there's still one thing i'm wondering about, and that's why Sukuna said to Jogo "since you're a cursed spirit you wouldn't know about this" when refering to his CT.

Bro COOKED 🔥🔥

The amount of thinking, the amount of proof to backup the theory convinces me that this guy is secretly gege himself