This article contains shocking and offensive content. Read at your own discretion.
Note that these can vary to tame to extreme depending on the person.
Outline
The contents of this includes sites, images, videos, ect. of erotic (sexual), gory (R-18G), ghost stories, stories, surprises, etc.
However, some of them may cause damage to your PC, such as browser crashes caused by PC viruses or web scripts. Therefore, unless you have sufficient immunity, tolerance, and knowledge of personal information leakage and security, you should not search for them out of curiosity (you may need to search for them for academic or research purposes, but even in that case, you need immunity).
If an image, video, or exe (a PC executable file) is hit, the viewer will suffer some kind of damage. Genres include PC damage, gore, horror, occult, nonsense, insanity, depression, ect. In 2014, TBS aired a one-off TV program which examined search terms and urban legends.
Aside
In recent years, videos of people searching for words they shouldn't search for have become popular on video sharing sites. There are many different types of live search videos, so if you're curious about search terms, you can watch along.
Currently, the highest danger level is 7, but at one time there were even danger levels up to 8. The description was "may be life threatening" in bold red letters with a black background. Wiki archives from that time do exist.
Currently, the number of words registered in the Wiki is over 2100.
List
In this article, only items for which pixiv articles exist or going to (even if they are not included in the Must not Search wiki) are listed.
The contributors, administrators, and authors of this article are not responsible for any unpleasant feelings you may experience as a result of searching.
About Genres
| Hall of Fame | Particularly well known in the Japanese language. |
|---|---|
| Culture Shock | A culture that overturns the common sense of others. Note this may come off as discriminatory. |
| Depression | Tragic content. |
| Occult | Unscientific. |
| Deformity | Unusual appearance. Can also come off as discriminatory. |
| Gross | Violence and cruel descriptions and expressions, etc. (Original translation is Guro, akin to gore but this has been changed for sake of convenience) |
| Truth | An incident or event that actually happened. |
| Organism | Creatures with unusual characteristics or abilities (fictional creatures are also included here). |
| Nonsense | Content that is incomprehensible to the average person (Original translation is Denpa but this has been changed for sake of convenience) |
| Mystery | Something that is shrouded in mystery. |
| Stories | Basically, anything that can be laughed off. |
| Insanity | Insane and antisocial behavior. |
| Surprise | Scary images, malicious prank videos, etc. |
| Perverted | Depictions or expressions of special preferences, etc. |
| Horror | Descriptions that stir up fear. |
| Mind Break | Material that causes psychological damage. |
| Food | Food or drink. |
| PC Damage | Items that cause damage to computers. |
| R-18 | Items that fall under the category of adult content. |
| Other | Items that do not fall under any of the above. |
| Order | Genre | Description |
|---|---|---|
| ＊ | ||
| ☆V☆E☆A☆H☆ | Horror | Dance music video by Barbapapa. |
| A | ||
| Acorn Woodpecker | Organism / Gross | A bird that can effect people with trypophobia due to them making many holes. |
| Acrotomophilia | Gross / Deformity | The fetish of amputees. |
| Ahenobarbus Henocied | Horror / Mystery / Hall of Fame | Western given name of a image of a gofun doll from a 2chan thread where the users edited her to be cuter. But westerns mainly don't know that and named it after a Facebook user's name using it as a profile picture. |
| Ai to Yuuki to Kashiwamochi | Horror / Hall of Fame | Puzzle game in the style of Yoshi's Cookie. |
| Amblypygi | Organism | Spider, some have been sold as pets. |
| B | ||
| Backwards Girl: Endless Summer Holidays | R-18 / Gross | A novel in which a girl is kidnapped, confined, and tortured continuously. |
| Brazen Bull | Gross | Cruel method of execution. |
| C | ||
| Candiru | Organism | Catfish from the Amazon. Frankly, more dangerous than a piranha. |
| Carmine | Organism / Stories | Bright-red pigment. |
| Cat Soup | Gross | Cruel but award-winning anime. This can also mean the manga it was based off of (see Nekojiru) |
| Chargeman Ken! | Stories | A crazy anime that has a lot of things going for it. |
| Chick Mixer | Gross | Chicks in a blender. |
| Cockroach | Organism | Most likely the most well known animal on this list. |
| Conker's Bad Fur Day | Gross / Stories | A parade of dark comedy and potty humor in a game developed by Rare Inc. |
| D | ||
| Darwin Awards | Stories | A tongue-in-cheek honor for people who died in a "idiotic manner" (unsusal). |
| Delete Immediately | Horror / Occult | Fake special screen of Japanese text covering the screen with the aforementioned title in Shin Megami Tensei II. |
| Demodex Folliculorum | Organism | Microscopic mite that can only survive on the skin of humans. |
| Depleted Uranium Ammunition | Deformity / Truth | Images of deformed children born due to radiation hit. |
| Der Flohwalzer | Gross / Nonsense | A execution scene in Danganronpa V3: Killing Harmony. |
| Dnepropetrovsk Maniacs | Gross / Insanity / Hall of Fame | Two 19‑year-old male murders from Ukraine. Known as Ukraine 21 in Japan (In reference to the number of known victims). |
| Don't Look for Wally | Surprise / Hall of Fame | A screamer flash game of Where's Wally (Waldo in North America). |
| Doragory | Gross | A monster from the 7th episode of Ultraman Ace. |
| Doraemon the Horror | Horror | Horror parody of Doraemon by Hideshi Hino. |
| E | ||
| Ed Gein | Insanity / Truth | A murderer who was crafting with dead bodies. |
| Eight Feet Tall | Occult | Japanese urban legend of a tall woman who abducts children. |
| Eihort | Gross | A monster by H. P. Lovecraft |
| Elsagate | Gross | Social issue on Youtube and Youtube Kids. |
| Eudocima Tyrannus | Organism | While not scary it's their larvae that is seen as creepy. |
| Evil Goddess MOCCOS | Stories | Poorly made KOS-MOS figure from a expensive boxset. |
| F | ||
| Faithful Reproduction of a Dream I had Today | Nonsense | Mysterious text to speech video with visuals of the 1927 Metropolis Maria's Dance scene sped up. |
| Fancy Island | Horror / Surprise / Hall of Fame | Browser game disguised as family friendly. |
| Female Sage | Horror | Character from Dragon Quest 3 but looking up the word in Japanese also shows up a scary face of a woman. |
| Foot Binding | Insanity / Truth | Chinese custom of binding young girls feet to a small size. It was seen as a status symbol. |
| G | ||
| Giygas | Horror | Antagonist of the MOTHER series (Earthbound). In MOTHER 2 there's a theory that they have a outline of a baby. |
| Gloomy Sunday | Depression / Hall of Fame | A song said to make people commit suicide when listened. |
| Gomenne Gomenne | Gross | Vocaloid song that been given many dark interpretations. |
| H | ||
| Hamster Hell | Gross | Stop motion cartoon by Lee Hardcastle. |
| Hakkōda Mountains Incident | Gross / Depression / Truth | Large-scale distress incident that occurred in Japan in January 1902. |
| Happy Tree Friends | Gross / Hall of Fame | Very violent web cartoon by Mondo Media. |
| Headless Mami | Gross / Depression | A meme centering around Mami Tomoe's death in Puella Magi Madoka Magica. |
| Heteropoda Venatoria | Organism | Commonly known as giant crab spider or cane spider. |
| Human Cannibalism | Gross | Human eating another human. |
| Hydnellum Peckii | Organism | A mushroom that looks like it's bleeding all over. |
| I | ||
| Ikigusare | Nonsense | Fictional deformed idol group. |
| Insane Set | Stories | Japanese McDonald's commercial selling SpongeBob SquarePants toys. |
| Issei Sagawa | Insanity / Truth | Japanese murder, cannibal and necrophile. |
| J | ||
| Jeff the Killer | Hall of Fame / Horror / Mystery | A edited image of a person with pale skin and burnt off eyelids that is shrouded in mystery of it's origin. |
| Jellied Eels | Food / Culture Shock | The world's worst tasting food, originating in England. |
| John Wayne Gacy | Horror / Truth | Serial killer who enjoyed dressing up as a clown. |
| Junko Furuta | Insanity / Truth | Japanese schoolgirl who was held captive for 44 days. The contents of this is very extreme. |
| K | ||
| Kiviak | Gross / Food | Traditional wintertime Inuit food from Greenland. |
| Kunekune | Occult | Japanese internet urban legend called Wriggling Body in English. |
| Kure Kure Takora | Gross | Tokusatsu kids' show with episode 220 never being rebroadcast. The contents was seen as verbally abusive towards the mentally ill with the character getting the abuse going on a violent rampage. |
| Kesagake | Gross / Truth | Name of a bear that most likely did the worst attack done by an animal. 60 armed men had to hunt the bear. |
| Kogenta | Insanity / Truth | Name of a cat tortured by a 2chan user. |
| Korean War | Gross / Truth | A war between North and South Korea. |
| Kuso Miso Technique | Perverted / Stories / Hall of Fame | Gay manga that is very popular within Japanese internet culture. |
| Kusozu | Gross | 9 stages of a woman's decay. Often depicts women such as a Empress to show "No matter how beautiful a woman is they will end up being ugly in the end.". |
| L | ||
| Leucochloridium | Organism / Hall of Fame | Parasites that use snails as hosts. |
| Linda³ | Gross | One of the few games given a 18+ rating on PC Engine |
| Lamprey | Organism | Jawless eel with a with gross mouth. |
| Louis XVII | Depression / Truth | A king of France who lived a tragic life. |
| Lobotomy | Gross / Truth | World's most dangerous surgery. |
| M | ||
| Magical Doctor | Surprise | A Vocaloid song about drug abuse. It features a promotional video that flashes and spins violently. |
| Matsuyama Kyowa Hospital | Gross / Horror | More specifically a harassment movement of shock sites disguised as review sites about the affiliated doctors. |
| Me!Me!Me! | Gross / Perverted | Erotic, gory music video for Japan Animator Expo. |
| Mermaid in a Manhole | Gross / Hall of Fame | 4th movie by Hideshi Hino for the Guinea Pig series. |
| Mike the Headless Chicken | Organism | A chicken who lived for 18 months after his head was cut off. |
| Momoiro Usagi | Surprise | An original song by Healing-P for Kagamine Len. |
| Mortal Kombat | Gross | A brutal fighting game known for it's gory fatality animations. In a more scarier note this had effected the mental toll of the animators due to the references they used. |
| Mopemope | Horror / Surprise | Controversial music video almost falling into Elsagate territory by being heartwarming at first glance. |
| N | ||
| Nanase Yui | R-18 | Name of a character from the kids' anime Go! Princess Pretty Cure but also a name of a pornstar. |
| Narutaru | Depression | Known as Shadow Star in the US. |
| Natsumi Step! | Depression / Hall of Fame | Horror web anime made in flash. Takehara Minoru most popular work, even been seen by quite a few people in the west. |
| Needlefish | Organism / Gross | A fish that can jump out of the sea and kill people. |
| Negimaru! | R-18 / Depression | Hentai series of Negima! Magister Negi Magi. |
| Nevada-tan | Truth | Name given to a 11-year-old female murderer by people on the internet. |
| Ningen | Occult | A humanoid creature from Japanese folklore. |
| Noroi-chan | Horror / Stories | Character from the TV program Shakiin! |
| Nugumu | Horror / Stories | A Virtual Youtuber. |
| O | ||
| P | ||
| panapp | Horror | An ice cream that, depending on how you eat it, can create a creepy face. |
| Pennywise | Horror | Clown character from the movie IT |
| Pingu 24th Episode | Horror | An episode seen so horrific that it has been banned in some countries. |
| Pipa Pipa | Organism | A frog that can trigger people with trypophobia. |
| Please Don't Jack Off To This | Other / Hall of Fame | Similar to the The Author is Sick tag but with a sexual nuance. |
| Pokémon Shock | Truth | About the worst broadcast accident in anime history. |
| Popee the Performer | Gross / Stories / Hall of Fame | CG' kids anime known for it's over the top violence. |
| Purple Mirror | Horror | The urban legend says that if you remember it until you are twenty, you will die. |
| Q | ||
| R | ||
| Rorochan_1999 | Truth | 14-year-old Japanese live streamer that committed suicide. |
| Running Cirno | Horror / Stories / Hall of Fame | A video made in MMD of a creepy running animation of Cirno. |
| R | ||
| Roadkill | Gross / Truth | Animals killed by car. |
| Rosalia Lombardo | Truth | Known as the most beautiful mummy in the world. |
| S | ||
| Sada Abe | Gross / Truth | Japanese geisha and prostitute who murdered her lover during the Showa Era. |
| Saikin Osen | Depression / Deformity | Another Vocaloid song with many dark theories. |
| Sampoong Department Store | Insanity / Truth | Deadliest modern building collapse until the collapse of the World Trade Center. |
| Sasebo Slashing | Truth | The event that Nevada-tan had partake in. |
| Satoru-kun | Horror | Japanese urban legend of getting any answer from a public phone. |
| Saturn Devouring His Son | Gross / Stories | There is actually two paintings of this, the more popular one is by Francisco Goya. |
| Sayonara wo Oshiete ~Comment te Dire Adieu~ | Depression | Visual novel by CRAFTWORK. A fan English translation was made on August 2021. |
| Sawney Bean | Gross / Insanity | Said to be the head of a cannibal clan. |
| SCP | Horror | A site that collects fictional monsters. |
| Sennichi Department Store | Depression / Truth | Japanese department store that went in flames. |
| Shōjo Tsubaki | Gross | More specifically the anime adaptation known as Midori in the west. |
| Shuji Tsugawa | Horror / Hall of Fame | A character from one Detective Conan's more depressive episode. |
| Sky Burial | Gross / Culture Shock | Funeral practice of being eaten by birds on mountaintops. |
| School Days | Gross / Surprise | Otherwise a normal harem anime till around the end. |
| Suicide Club | Guro | Known in Japan as Suicide Circle is a indie film. |
| Sumarian | Horror | Specifically their wide eye statues (some much bigger than others) that bought up theories of the Sumer people appearance. |
| Sumo Sticker | Horror / Mystery | Mysterious stickers with two faces from Chaos;Child. |
| Spoo | Horror | More specifically Shoko Haida's drawing of the character that became incidentally scary. |
| Squidward's Suicide | Horror / Stories | So called lost episode of SpongeBob SquarePants. |
| T | ||
| Terrifying Kyou-chan | Guro | Parody of Hitoshi Matsumoto's Obake no Q-taro. |
| The Girl Who Trod on the Loaf | Depression | One of Hans Christian Andersen's fairy tales. |
| The Headless Girl Incident | Guro / Insanity | A murder case that occurred in Aichi Prefecture in 1932. |
| This Man | Occult | A marketing stunt featuring a somewhat unnerving picture of a man's face. |
| Tiananmen Square Massacre | Guro / Truth | An incident that took place in Tiananmen Square, Beijing. |
| Toro on Holiday Photo | Horror / Occult | A rumored photo of ghost in the game Toro on Holiday. |
| Trypophobia | Guro | The fear of holes, mainly many holes close together on say a body. |
| Tsunaka Yuriko | Horror | Japanese urban legend of a name that must not be enter in video games. |
| Ttongsul | Guro / Food | Alcohol made from human feces. |
| U | ||
| Ultra-Super-Deluxeman | Stories / Guro | Science fiction manga by Fujiko Fujio. |
| Username666 | Horror / Hall of Fame | Horror video by Japanese visual artist Piropito. |
| V | ||
| W | ||
| Waita Uziga | Guro | Bizarre manga artist with his most known work in the west being Mai-chan's Daily Life. |
| William Utermohlen | Depression | An artist with alzheimer's disease most known of his portraits showing his decline over the years. |
| X | ||
| XXX | R-18 | A term often use to mean porn. |
| Y | ||
| Yoshie Kimura | Horror / Stories | Main antagonist of Death Forest. |
| You Are An Idiot | PC Damage | A flash virus that would open many windows. |
| Yume Nikki | Horror / Depression / Hall of Fame | Game where you walk around in a dark dream. |
| Z | ||
| Zdzislaw Beksinski | Horror | Within Japan it's rumored his art will kill you if seen 3 times. |
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