It chips away at a person's core -- sanity, reason, even identity -- eventually destroying him. Nothing that made him who he is is left behind. Once it gripped your heart, you'll quickly succumb to despair and loneliness. The essence of what makes you human is literally eaten away, as if by worms. When this happens, the body begins to necrotize and the soul becomes as black as spent ash. We've come to regard this process as 'darkening.' And whosoever succumbs to the darkening becomes an inseparable part of the school itself. In rare instances, one may be able to avoid the full act of darkening, instead fated to be seared unbearably by intense, violent thoughts and emotions. But most of the time, his soul will be rooted here, and he will be cursed to wander these halls for eternity with no hope of passing or exorcism.

Strange But True: Stories of the Occult 4, Corpse Party

Gradually consumes one's sanity, turns the body into dark mist and ultimately kills. Its effect can differ, however, when a person with high spiritual affinity falls prey.

—Encyclopedia Obscura, Corpse Party: Blood Drive

Darkening Vision

The hazy vision received with high darkening levels.

The Darkening (黒化 Kokuka?) is a terminology used in the Corpse Party series. It is the process in which a victim succumbs to negative emotions, such as hatred, grief, sadness, envy, jealousy, etc. It causes the victims to act on their emotions, and sometimes becomes completely apathetic and may lead them unconsciously killing others. In some cases, the victims' obsession towards something may also cause them to experience the darkening.


The black mist, a common depiction of a malign spirit.

When the victims regain control of their body after a darkening experience, they will not be able to recall the events that occurred during their darkening, let alone realize they were experiencing it.

The darkening will also leave their mind and body vulnerable to possession by malign spirits. Such is the case of the ghosts; a glance into their eyes invokes this instantaneously.

Screenshot 0031

The darkening dripping from Naomi's skirt

Darkening manifests on people in different ways, the most common being a black mist that veils their body. However, it can also manifest in other forms, such as black, tar-like liquid pouring out of the body (Introduced in Corpse Party: Book of Shadows). If the victim is able to ward off these negative emotions, the darkening will leave their body, and the black mist surrounding them will vanish.

In Corpse Party: Blood Drive it is revealed that people with high spiritual capacity can even transform into other beings due to Darkening, with Azusa Takai and Haruyuki Inumaru being perfect examples as such.

Gameplay Edit

Game over

Game over screen when the Darkening meter is at 100%.

Corpse Party: Book of Shadows Edit

Spoiler Warning!: Spoilers for Corpse Party: Book of Shadows follow

Corpse Party: Book of Shadows introduces the darkening as a gameplay mechanic which can be viewed via the Darkening meter (精神汚染度 (Mental pollutionシステム) Seishin Osen Do (Mental pollution shisutemu)?, lit. "Mental Pollution System").

Darkening is increased when examining corpses, inspecting certain objects, or during special events. As the darkening meter fills, the character's vision becomes progressively hazier. Obtaining 100% darkening will either lead to a wrong end in certain episodes, or simply a game over in others.

Corpse Party: Blood Drive Edit

Spoiler Warning!: Spoilers for Corpse Party: Blood Drive follow

Corpse Party: Blood Drive also uses the darkening mechanic, although simplified. When your darkening increases, the screen becomes grainy and harder to see. Unlike the previous game, there is a way to remove the darkening - by using a statue item. You can also switch characters to briefly escape the darkening, as the effects are character specific.

Victims Edit

These are the names of characters who canonically fell victim to the darkening (this does not include wrong endings):

Major Characters Edit

Nametag Characters Edit

Plot Edit

Naomi Nakashima Edit

During the events of Corpse Party (PC, PSP, iOS, 3DS), Naomi's weak psychical state causes the Darkening to temporarily possess her, leading to the death of Seiko Shinohara by hanging in the third stall of the second floor girls' restroom. She also set Seiko's shoes neatly on the ground, as though it were a suicide. When the darkening lets go of Naomi for a brief period, it throws her into a spiral of grief, sadness, and depression.

The darkening takes hold of Naomi again in Chapter 4, which leads her to attempt suicide without her knowledge. She then experiences another darkening when she learns that she is the one who murdered Seiko under the influence of the darkening. However, Seiko's spirit saves Naomi from succumbing to her emotions by sending her a series of text messages, indicating she has forgiven Naomi, which leads her to help the others find their way out of Heavenly Host.

The same events are shown in Corpse Party: Tortured Souls, but we see that the darkening left Naomi's body fully, now able to cope with Seiko's death.

Ayumi Shinozaki Edit

During her time in Heavenly Host, Ayumi is prone to being possessed, possibly due to her high sensitivity to spirits, but it should not be confused with the influence of the darkening.

In Chapter 5 of Corpse Party, Yuki Kanno mentioned that Ayumi already showed signs of the darkening and it began to take hold of her.

If Yoshiki decides not to return to Heavenly Host with Ayumi, she will opt to go back on her own. Without Yoshiki to keep an eye on her, Ayumi will begin to feel jealous about the relationship between Naomi and Satoshi Mochida, leading her to hide Naomi's paper doll scrap in order to escape with just Satoshi. However, it is unclear if these actions are fueled by the darkening or simply out of jealousy.

Satoshi Mochida Edit

Canonically, Satoshi doesn't fall to the darkening, and so its effects can only be seen in wrong ends.

In Wrong End 2 ★4 of Chapter 5 in Corpse Party, Satoshi finds a photo which shows the corpse of his beloved sister. This enrages him, and he starts chasing Sachiko. Naomi follows him, but she falls behind. Satoshi eventually reaches the abandoned bomb shelter, where he finds Yuka's lifeless body. Satoshi can't stand the sight and he succumbs to the darkening.

Yoshiki Kishinuma Edit

Canonically, Yoshiki doesn't fall to the darkening, and so its effects can only be seen in wrong ends.

In Corpse Party Wrong End 2 ★4 of Chapter 5 , Yoshiki decides to not come back to school with Ayumi. In the end it is shown that he came back in hope of protecting Ayumi, but succumbs to the darkening near the incinerator and dies.

Mayu SuzumotoEdit

During the events of Corpse Party, Mayu had already been maliciously murdered. She visited and watched Morishige performed on-stage in Heavenly Host. She first began to darken after Kizami taunted Morishige and made him took his own life away despite trying to reach to him with her voice but as a result, it failed to reach him. 

In the end of Corpse Party: Book of Shadows, Ayumi and Naomi performed a forbidden resurrection spell in the Shinozaki Estates. As a result, it successfully revived Mayu but came with errors. Shortly after the revived Mayu was materialized, she was once again killed by supernatural forces and her spirit was sent back to Heavenly Host and she darkened even more.

In the beginning of Corpse Party: Blood DriveAyumi encounters Mayu again after a failed resurrection spell back in the Shinozaki Estates. Mayu desperately calls out for Morishige, and then proceeds to chase and attack Ayumi with no hesitation.

Sakutaro Morishige Edit

In Corpse Party: Book of Shadows, Sakutaro can succumb to darkening in many ways.

In Wrong End 5 ★5, Sakutaro's darkening causes him to become more psychotic to the point of torturing a person together with Sachiko.

In Wrong End 4 ★4, Sakutaro sees Ayumi's corpse inside a hole, causing him to become more sadistic and then fall under the influence of the darkening.

Sayaka Ooue Edit

Sayaka's name tag in Corpse Party revealed that she succumbed to the darkening while searching for her friend, that is before she was discovered by Yoshikazu Yanagihori who bludgeoned her to death in Corpse Party: Book of Shadows. In addition, she is seen hallucinating while meeting up with Naho in Corpse Party: Book of Shadows manga.

Haruyuki Inumaru Edit

In CHAPTER 02 『 Respective Desires 』 of Corpse Party: Blood Drive, once Haruyuki sees Sayaka's corpse, he falls into despair and then fury, pointing the blame towards Aiko Niwa. However, due to Haruyuki's high spiritual power, he not only succumbs to the darkening, but is transformed into a Hell Hound. He then proceeds to chase Aiko throughout the school.

Azusa Takai Edit

It is revealed that Azusa fell victim to the darkening at some point. In Corpse Party: Blood Drive, CHAPTER 05『 Breakdown 』, she is shown to work with the Anatomical Model to try and kill Yoshiki, referencing Yuuya Kizami meeting Azusa at the end of the Wrong End of Corpse Party -THE ANTHOLOGY- Sachiko no Ren'ai Yūgi ♥ Hysteric Birthday 2U extra chapter. It is unclear what becomes of her after Corpse Party: Blood Drive.

Significant plot details end here.