Alright so here is my cosmology post of Instant Death. Keep in mind I will ONLY be doing the cosmology in Instant Death. I will not be including cosmology from any other of Fujitaka’s works. Now that we got that out of the way, let us start!

Celestial Foundations/Heavenly Records

The Celestial Foundation (also called Heavenly Record) is the universe/timeline itself. Differently from a normal timeline, a celestial foundation consists of not only the universe, but also a vessel/canopy that envelops said universe.
Celestial Foundations also contain everything that makes up the universe on a conceptual level. And as we know, dimensions are just elements of a universe, therefore a Celestial Foundation contains the very concept of dimensions. The Celestial Foundation is capable of containing multiple timelines simultaneously. Whenever Darian died, his soul was able to travel back in time. Every time he travelled back to the past because of his death, it created an entirely different timeline. There are also numerous parallel worlds in a Celestial Foundation. This is supported by Lynel’s Random Walk ability. Every time he dies, he is sent to parallel universes with different possibilities to ensure his survival. And he is stated to have died “countless times”. And we see this multiple times.

The Abyss

The Abyss is a 4th dimensional plane that is presumably within the celestial foundation of Yogiri’s original world before he was isekai’d. It contains 4 spatial dimensions and seemingly one of time, as the King could age and starve to death while inside it.

The Sea

The Sea is a multiverse that contains all celestial foundations. It is stated possess a countless amount of them. The foundations are structured in a stacked abstract vertical hierarchy. The energy flows from the top to bottom, and due to that, one needs a tremendous amount of power to transfer from a lower world to a higher world. The Sea is also stated to be an infinite space

Celestial Foundation Eaters/Heavenly Record Eaters

Celestial Foundation Eaters are cosmic beings of immense size that swims throughout the Sea. They are big enough to dwarf entire celestial foundations and constantly eat those for nourishment, but also for consumption of knowledge and raw information derived from them. Celestial Foundation Eaters are also described as being on the level of a god.

Celestial Axis

The Celestial Axis connects all Celestial Foundations. By going through it you can visit all sorts of worlds. The Celestial Axis is not physical, but rather a conceptual corridor that connects all worlds.

Higher Universes

The higher universes (not to be confused with universes higher in the hierarchy of the Sea), are universes situated beyond the Sea. Taking UEG’s statement into account after Toichirou managed to step into a higher universe, it is implied that they are “much more of a higher-dimensional” structure than the Sea. In addition, each higher universe is contained by a larger higher universe, which is in turn contained by a yet larger higher-universe, and so on. And each of those higher universes were equated to a higher dimension that consequently dwarfs the previous. Also when UEG was fighting Toichirou, they jumped to higher universes and even outside of the dimensional space. There might be an infinite amount of higher universes. While it is more or less implied to be a theory from Kouryu’s part, half of it was already directly proven true in the battle of UEG against Toichirou. One might say that the higher universes being considered “higher-dimensional” would be a contradiction (since they are above Celestial Foundations, which already contain the concept of dimensions) but not necessarily. Lower universes or Celestial Foundations are stated to be “in and of itself” (existing of its own capacity or independently) and being the foundation of everything on a conceptual level it’d be conceptually isolated from anything else. The reason why this would apply to the higher universes is because the higher universes which contain and dwarf the lower ones would also as a result have their own higher concepts or foundation “in and of itself” that everything is a part of as they do not share the concepts of the lower worlds. This is further supported by them having their own laws.

Ultimate Ensemble World

The Ultimate Ensemble World is everything that exists, which includes the Sea, Celestial Foundations, and everything above. The Ultimate Ensemble World is the totality of existence.

Mysterious Space

The Mysterious Space (Otherwise known as the Q&A Corner) is (like the name says) a mysterious space. It is a place outside of the main novels and also outside Space and Time. This means that beings in the Mysterious Space view the entire story (Instant Death) as fiction.

The End

Outside of all of this is The End (In other words, Yogiri’s true form.) It is described as the natural limiter of reality where nothing is beyond it to the point that Fate and Plot are nothing more than a joke to it. It is even described as the inevitable destination of all fates, beyond which there is nothing. And also the embodiment of nonexistence itself. The End also exists across Space and Time since the very beginning. According to the author (Tsuyoshi Fujitaka), this true form is beyond the concept of dimensions entirely, to the point where no amount of dimensional stacking would be able to reach it. To further prove that it exists outside the cosmology, it is implied that Yogiri Takatou can kill the Q&A Corner (Mysterious Space). Since The End (Yogiri's true form) is on an even higher level than Yogiri (beyond the concept of dimensions and inaccessible no matter how dimensions many are stacked), this confirms that The End can exist even without the novel, meaning it exists completely independently.

Anyways that marks the end of my cosmology post. Someday I might make another one but include cosmology from Neechan wa Chuunibyou and Unbeatable Demon King (Unless someone does it before me lol) Anyways. Apparently the novel uses the same kanji as Max Tegmark’s Ultimate Ensemble.%20%E3%81%A8%E3%82%82) I didn’t really care to read it (even though I probably should…) someone also made a good explanation on it (didn't read that either but ye... W Daikon) but yeah… anyways this is the end. Hope you enjoyed! Feel free to share this, quote this, whatever you want idc… Bye-Bye now!

P.S. I might be editing this and maybe adding more every now and then so be on the lookout!

Seeing as there is a recent and significant amount of newcomers here, I decided to make a simple respect thread for Yogiri, for people to be more familiar with his nature, his abilities, and how powerful he is.

Senses

• Yogiri can perceive killing intent.
• Yogiri can visibly see hazards to his life before they actually happen.
• Killing intent is actually not required to activate Yogiri's ability, as he perceives all possible threats to his life. Even if you have no intention of harming him, he is still going to predict/sense the attack if it's a threat to his life. This has caused him to kill people that didn't even know about his existence.
• Yogiri can see hazards in the form of shadows which allows him to know where attacks are gonna land, the source of the danger or the trajectory of the attack.
• Yogiri could detect and kill Tracy, whose power makes her literally impossible to be perceived.
• Yogiri can detect danger in foods.

Instant Death Ability

Capabilities:

• Yogiri explains his power and how he can kill people just by thinking.
• Yogiri can kill specific body parts of a person's body.
• Yogiri "killed" a dog man's eyes, ears, and nose; negating the senses that go along with them. No amount of healing magic was useful, and the dog-man is completely unable to communicate with others or grasp aspects of the world, even telepathy is effectively negated.
• Yogiri's Instant Death "killed" Lisa's ice magic, completely negating it, and he also "killed" her magic staff causing it to shatter to pieces.
• Yogiri can kill clothes.
• Yogiri killed Lain's true body through the indirect connection Lain's B existence had with Lain's (main) existence whose existence was reliant on her real body which was located in a completely different dimension.
• Yogiri can kills undeads.
• Yogiri's ability kills an entire battalion of undead monsters and people with "immunity" to Instant Death.
• Yogiri can kill inanimate objects.
• Yogiri can kill the powers of a target.
• Yogiri can kill ghosts and souls.
• Yogiri can kill momentum.
• Yogiri can kill radiation, light, noise, wind and heat.
• No phenomena can survive Yogiri's ability, and there are no countermeasures that can be done against it.
• Yogiri's ability negates resurrection.
• His power is irreversible.
• Even if the concept of death doesn't apply to you, you still die to Yogiri.
• Yogiri's ability is stated numerous times to lack cause and effect relationships.
• Yogiri's power transcends cause and effect.
• Yogiri can use his power through the use of other people as a medium, and can also kill anyone/anything that his targets have ever seen from their memories.
• What dies and what phenomenon occurs, all of it relies on Yogiri's subjective perception of death. (In other words, his power is based on his very imagination. Whatever he imagines in relation to death is what actually occurs and this is absolute)
• No matter how much defenses or resistances one has to instant death abilities, it is all meaningless in front of Yogiri's power.
• Yogiri can kill hypothetical beings.
• Yogiri could kill Alice's dimension and its laws/rules.
• Yogiri could eradicate Izelda's lineage by killing over sixty million of his descendants, along with all the livestock, wild animals, insects, plants, and infinitesimal bacteria that contained his factor. Yogiri was able to do this even though Izelda's consciousness was hidden in most of the people who possessed his factor, and killed his offspring so throughly that not even a piece of their genetic information remained.
• Yogiri can use his power through the use of other people as a medium, and can also kill anyone/anything that his targets have ever seen from their memories.
• Yogiri can eliminate any concept.
• The author personally stated in the Afterword that Yogiri can kill anything without any limits, which by consequence would include Celestial Foundations of the verse, which are conceptual in nature, as well as the information that makes up reality.
• Even lesser beings in the series can kill concepts or erase a target across all timelines.
• Yogiri's ability is stated to be "the power to make anything and everything disappear".
• His power is limitless and the author also states that it does not have any limit.
• Yogiri could kill the Celestial Foundation Eater before it could kill him. For reference, Celestial Foundations are universes, and each of those CFs contain further parallel universes inside it (universes inside universes), of which there are so many that an individual was likened to a single hair on his head when compared to all the parallel versions of himself. The Foundation Eaters are quite literally multiversal fishes that eat those Celestial Foundations. In fact, just their mouth alone dwarfs a Celestial Foundation in size. Even time and space are only a part of their existence, implying their superiority over those.
• Yogiri killed UEG, who could previously regenerate from her existence being utterly erased. For reference, UEG has also destroyed numerous universes, she has jumped "out of dimensional space", and transcends time and space.
• As a result of fighting Yogiri, some gods in the verse have "disappeared" and vanished, being thus "removed" from the Ultimate Ensemble World. The Ultimate Ensemble is the totality of existence, including not only the multiverse but also worlds beyond even that, which are also nested within each other and have different fundamental laws.
• To be killed by Yogiri is to be sent to eternal nothingness.
• Despite the entire world being Mitsuki's dream, Yogiri could defeat him by killing the relationship between dream and dreamer, completely disconnecting Mitsuki from his own dream, and as such leaving Mitsuki on a comatose state.
• Yogiri was implied to be able to kill the Question Corner (QnA sections done by the author at the end of each volume). According to Tomochika, this would likely result in the lack of other Bonus Short Stories for the next incoming volumes. In addition, the Question Corner is stated to exist as a "mysterious space outside the novel".

Automatic Defenses:

• Yogiri can use his powers even while sleeping.
• Yogiri's power automatically activates against abilities that tries to manipulate his mind.
• Yogiri considers forced teleportation to be an attack. Thus, trying to teleport him against his will would result in death for the opponent.
• Even if the opponent is faster than what Yogiri can react, his powers activate automatically to retaliate them before any harm is done.
• Even as a baby, Yogiri could still retaliate with his power.
• Killing Yogiri is impossible. No matter how fast an attack is, it won't work. Unseen and indiscriminate attacks are also equally worthless against him.

True Form

• Yogiri's true form is the End of all things. An embodiment of nonexistence that overcomes all others, and from which everything returns to after their end/deaths, of which there is nothing beyond, not even Fate or Plot itself.
• Yogiri's true form was compared to a natural limiter of reality, in which it is the inevitable end of the line that puts in check whatever god or entity that tries to destroy all of creation, ensuring its safety and balance.
• His true form exists across all space and time.
• His true form can act in stopped time.
• The author implied that Yogiri's true form is inaccessible to higher dimensions, no matter how many of them are stacked, as it can destroy all of those things.

Miscellaneous

• Yogiri can perceive and freely manipulate the higher-dimensional Abyss/Astral Plane.
• His power can manifest through videos, audios, cameras and any other recording device, even if not in real time.
• Yogiri's ability is not magic.
• Yukimasa's ability of rewriting the future at will did not work against Yogiri, resulting in Yukimasa's death instead.
• Yogiri was born with his powers.
• Trying to nullify his power is useless.
• If Yogiri dies, he will eventually reincarnate into a new vessel.