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Yokai: The Ultimate Guide to Creatures, Spirits, and Demons of Japanese Folklore

Updated: Feb 14

The sun sets on the archipelago. The Japanese call this moment Ōmagatoki (逢魔が時) — 'the hour when we cross paths with demons'. It is the precise moment when the light hesitates between day and night, when the contours of things blur. It is the hour when they come out.


They are the Yokai (妖怪). And if you are reading these lines, you have already fallen into their world.


The Yokai (妖怪) are the supernatural creatures of Japanese folklore. The term literally means 'strange apparition' (妖 yō = bewitching, 怪 kai = mystery). Neither angels nor demons in the Western sense, they embody human fears, mysteries, and emotions. We distinguish Oni (ogres), Tengu (bird-men), Kitsune (foxes), Kappa (water spirits), Yūrei (ghosts), and Tsukumogami (living objects). First mention: Heian period (794–1185).


In my Dai Yokai workshop in Brittany, I have been sculpting and painting these faces for years.


From furious Oni to enigmatic Kitsune, through tragic Hannya and proud Tengu — each mask is a chapter in this guide you hold in your hands.

This article is the entry point to the entire Dai Yokai universe. It is the pillar. The map of the territory. If you only read one article about Japanese folklore, this is the one.


What is a Yokai? Definition and Etymology


The etymology: two kanji that say it all

Kanji

Reading

Meaning

Nuance

Bewitching, attractive, calamity

The idea of seduction AND danger

Kai

Mystery, strange, apparition

The inexplicable, what escapes reason

妖怪

Yōkai

'Strange apparition', 'bewitching mystery'

Generic term for ANY supernatural creature

A Yokai is not a 'monster' in the Western sense. It is a personified phenomenon. Why does the house creak at night? It is the Yanari. Why do people drown in the river? It is the Kappa that pulled you by the feet. Why do you get lost in the mountains? It is the Tengu that led you astray.


Yokai were born from the human need to explain the inexplicable in an animistic society where every element of nature — rock, tree, river, wind — can house a spirit.


Neither Good nor Evil: the Japanese nuance


In the West, we classify things as Good (angels) or Evil (demons). The Yokai rejects this binary logic. The same Yokai can be benevolent one day and murderous the next — exactly like nature itself.


The Kitsune is the perfect example: as the messenger of the god Inari, it protects the harvests (Zenko, benevolent fox). But as a Nogitsune (wild fox), it seduces and destroys. Same creature, two faces. This is why I make white Kitsune masks AND black Kitsune masks.


The Great Taxonomy — Yokai, Yūrei, Kami, Obake: Who is Who?


This is THE confusion that comes up most often among my clients. 'Is it a demon or a god? A ghost or a monster?' Here is the definitive classification.


Taxonomic table of the Japanese supernatural

Category

Japanese

Definition

Examples

Dai Yokai Link

Yokai 妖怪

Yōkai

Generic term: any supernatural creature born of nature, emotions, or magic

Oni, Tengu, Kappa, Tanuki

Yūrei 幽霊

Yūrei

Ghosts: spirits of deceased humans who cannot find rest

Onryō (vengeful spirit), Goryo, Funayūrei

Kami 神

Kami

Shinto deities: revered in shrines, prayed to, respected

Raijin, Fujin, Inari, Amaterasu

Obake お化け

Obake

'Thing that transforms': subcategory of Yokai capable of metamorphosis

Kitsune, Tanuki, Bakeneko

Bakemono 化物

Bakemono

Synonym of Obake, but often for more monstrous forms

Rokurokubi (extendable neck woman), Noppera-bō (faceless)

Mononoke 物の怪

Mononoke

Vengeful spirit that possesses a human (combines Yokai + destructive emotion)

Princess Mononoke (Ghibli), jealousy spirits in The Tale of Genji

Tsukumogami 付喪神

Tsukumogami

Everyday objects that acquire a soul after 100 years of existence

Karakasa-obake (umbrella), Chōchin-obake (lantern), Biwa-bokuboku (lute)

Henge 変化

Henge

Shape-shifting animals: animals that have lived long enough to gain supernatural powers

Kitsune, Tanuki, Jorōgumo (spider), Bakeneko

Simple rule to find your way around:


  • Yokai = umbrella term (EVERYTHING supernatural)

  • Yūrei = was human, died, comes back

  • Kami = we pray to it, we build a shrine for it

  • Obake/Henge = it transforms

  • Tsukumogami = it was an object, now it is alive


The boundary is porous. Raijin and Fujin physically resemble Oni (claws, fangs, colored skin), but they are Kami revered in temples. The Ryū Dragon is a fantastic creature, but treated as a water deity. Even the ferocious Oni can become a Buddhist guardian serving Enma (King of Hell).


The History of Yokai — From Terror to Entertainment


Chronological Timeline

Period

Dates

Key Event for Yokai

Heian

794–1185

Age of terror. Yokai live in the shadows. Great exorcisms (Onmyōji). First tales: Konjaku Monogatari Shū. Oni, Tengu, and vengeful spirits dominate the imagination.

Muromachi

1336–1573

First illustrations of Yokai in painted scrolls (emaki). The Hyakki Yagyō Emaki (Night Parade Scroll) appears. Tsukumogami (living objects) become a popular theme.

Edo

1603–1868

The revolution. Printing explodes. Toriyama Sekien publishes his 4 illustrated encyclopedias (Gazu Hyakki Yagyō, 1776). He gives a definitive face to hundreds of Yokai. The monster shifts from fear to entertainment. Yokai card games (Obake Karuta), ukiyo-e prints, horrific Kabuki theater.

Meiji

1868–1912

Forced modernization. The government promotes science and rejects 'superstitions'. Electric light replaces lanterns — fewer shadows, fewer monsters. Yokai are threatened with extinction.

Shōwa

1926–1989

Shigeru Mizuki (1922–2015) saves the Yokai with his manga GeGeGe no Kitarō (1960s). He makes Yokai sympathetic and creates new creatures perceived as 'traditional'. Explosion in anime and manga.

Heisei / Reiwa

1989–today

Yokai are everywhere: Pokémon, Ghibli, Demon Slayer, Jujutsu Kaisen, Nioh, Ghost of Tsushima. The Yokai has become a global cultural product.

Toriyama Sekien: the father of monster design


Without this 18th-century artist, there is no Pokémon. No Demon Slayer. No Yokai Watch.

Toriyama Sekien did for Japanese monsters what Linnaeus did for plants: he cataloged, named, and illustrated them in four foundational encyclopedias. Before him, Yokai existed in oral tradition — each village had its own names and descriptions. After him, every Yokai had an official face and a definitive name.


Hyakki Yagyō: The Night Parade of One Hundred Demons


This is the most famous concept in the folklore. On certain summer nights, all the Yokai come out together to parade through the streets. One-legged umbrellas, lanterns with hanging tongues, muscular Oni, long-nosed Tengu — a chaotic and terrifying procession.

If a human crosses paths with this parade, they die of fright or disappear forever. Only the sunrise disperses the crowd.


This concept directly inspired the bathhouse scene in Spirited Away (Miyazaki) and the Yokai parade in Pom Poko (Takahata).


The Nihon San Dai Yōkai — The Three Great Evil Yokai of Japan


Every pantheon has its superstars. Japanese folklore recognizes three supreme Yokai, the Nihon San Dai Yōkai (日本三大悪妖怪). They are not the most numerous, but the most dangerous in all of Japanese history.

Yokai

Japanese

Nature

Legend

Threat Level

Shuten-Dōji

酒呑童子

King of the Oni, leader of the Mount Ōe demons

A giant alcoholic Oni who kidnapped and devoured the inhabitants of Kyōto. Defeated by the hero Minamoto no Raikō and his 4 companions using poisoned sake.

☠️☠️☠️☠️☠️ — The most powerful Oni in history

Tamamo-no-Mae

玉藻前

9-tailed Kitsune (Kyūbi no Kitsune)

A demon fox who infiltrated the imperial court in the form of a perfect woman. Wreaked havoc for 3,500 years across 3 continents (India, China, Japan). Unmasked by the exorcist Abe no Yasunari. Her body became the Killing Stone (Sesshō-seki).

☠️☠️☠️☠️☠️ — The oldest and most cunning Yokai

Emperor Sutoku

崇徳天皇

Onryō (vengeful spirit) turned Great Tengu

A fallen emperor who swore to curse Japan from the afterlife. He is blamed for the civil wars, natural disasters, and epidemics that followed his death.

☠️☠️☠️☠️☠️ — The longest curse in Japan

I dedicated a full article to Shuten-Dōji and Tamamo-no-Mae / the most dangerous women in folklore. These legends are the pillars of the folklore — if you do not know them, you do not understand the Yokai.


The Great Yokai Families — Illustrated Encyclopedia


There are thousands of Yokai. I have selected the 20 most important, classified by family, with their deep meaning and their connection to the masks I make.


1. The ONI (鬼) — The Ogre-Demons



The absolute superstar of the folklore. The Oni is brute force incarnate: large, muscular, red or blue skin, bull horns, iron club (kanabō).

Oni

Color

Symbolism

Buddhist Sin

Aka-Oni (赤鬼)

Red

Anger, passion, desire

Greed (ton)

Ao-Oni (青鬼)

Blue

Cold hatred, grudge

Anger (shin)

Kuro-Oni (黒鬼)

Black

Doubt, ignorance

Stupidity (chi)

Midori-Oni (緑鬼)

Green

Laziness, illness

Sloth

Ki-Oni (黄鬼)

Yellow

Egocentrism, regret

Remorse

The Oni is not a 'villain' in the Disney sense. In Buddhism, he is the guardian of Hell (Jigoku) under the orders of King Enma. He punishes sinners — he is an executioner, not a rebel. At the Setsubun festival, beans are thrown while shouting 'Oni wa soto! Fuku wa uchi!' ('Demons out! Fortune in!').



2. The TENGU (天狗) — The Masters of the Mountain



Half-men, half-birds, the Tengu are the guardians of sacred forests and the ultimate masters of martial arts. According to legend, it was a Tengu who taught swordsmanship to the young Minamoto no Yoshitsune.

Type

Appearance

Role

Daitengu (大天狗)

Red face, long phallic nose, feather fan

Leader of the Tengu, protector, but arrogant

Karasu Tengu (烏天狗)

Crow beak, black wings, claws

Aerial warrior, more violent than the Daitengu

Konoha Tengu

Small, mischievous, leaf wings

Prankster, Daitengu's minion

The long nose of the Daitengu is a symbol of pride (tengu ni naru = 'to become a Tengu' means 'to get a big head' in Japanese). Hanging a Tengu mask in a dojo is a reminder of discipline: 'Be strong, but stay humble.'



3. The HANNYA (般若) — The Mask of Jealousy



Beware of the trap: the Hannya is NOT a species of Yokai. It is a human woman transformed into a demon by the power of her jealousy and rage. It is the most emotionally complex mask in Noh theater: seen from the front, it howls with anger. Tilted downwards, it weeps.

Mask Color

Stage of Transformation

Dominant Emotion

White (Shiro Hannya)

Beginning — jealousy simmers

Sadness, silent suffering

Red (Aka Hannya)

Middle — rage erupts

Anger, uncontrollable passion

Black/Bronze (Kuro Hannya)

Final — the soul is consumed

Pure hatred, point of no return


4. The HENGE (変化) — The Shape-Shifters



Animals that, as they age, acquire the ability to transform into humans to deceive, seduce, or protect.

Creature

Japanese

Original Animal

Power

Alignment

Kitsune

Fox

Metamorphosis, illusion, fire (Kitsunebi). Up to 9 tails = quasi-divinity.

✅ Zenko (benevolent) / ❌ Nogitsune (evil)

Tanuki

Raccoon dog

Metamorphosis, disguise. Can transform its... attributes into anything.

✅ Generally a prankster and bon vivant

Bakeneko

化け猫

Cat

Walks on 2 legs, speaks, wakes the dead, dances with a towel on its head

⚠️ Neutral to dangerous

Nekomata

猫又

Old cat (forked tail)

More powerful than the Bakeneko: corpse manipulation, supernatural fire

❌ Generally evil

Jorōgumo

絡新婦

Jōrō Spider

Transforms into a beautiful woman, plays the biwa (lute), traps men in her webs

❌ Deadly predator

Inugami

犬神

Dog

Dog spirit summoned by sorcery, possession

❌ Dangerous (created by a cruel ritual)


5. AQUATIC YOKAI

Creature

Japanese

Description

Danger Level

Kappa

河童

'River child'. Green skin, turtle shell, beak, a water-filled hollow on the head (sara). Loves cucumbers and sumo. Can drown the unwary — but can be defeated by bowing to it (it bows back and loses its water).

⚠️ Medium — dangerous but stupid

Umi-Bōzu

海坊主

Giant black monk who emerges from the ocean to smash ships

☠️ Deadly

Funayūrei

船幽霊

Ghosts of drowning victims who ask for a ladle to fill the boat with water (and sink it)

☠️ Deadly — never give a full ladle

Ningyo

人魚

Japanese mermaid. Eating her flesh grants immortality... but attracts a curse.

⚠️ Ambivalent


6. HUMANOID YOKAI and URBAN LEGENDS

Creature

Japanese

Description

Era

Kuchisake-onna

口裂け女

The Slit-Mouthed Woman. Wears a surgical mask and asks: 'Am I beautiful?'

Urban legend, 1979 panic

Teke Teke

テケテケ

Ghost of a woman cut in half by a train. Moves on her elbows making a 'teke teke' sound

Modern urban legend

Yuki-Onna

雪女

The Snow Woman. Transparent white skin, blue lips, drains the life force of travelers lost in blizzards

Ancient folklore + Kwaidan film (1964)

Rokurokubi

ろくろ首

Woman whose neck elongates at night while she sleeps

Edo period

Noppera-bō

のっぺらぼう

Faceless person who terrorizes night walkers

Ancient folklore


7. The TSUKUMOGAMI (付喪神) — Living Objects


The most poetic category. In Shinto cosmology, everything possesses a spirit (kami). An object used for 100 years acquires a soul of its own and can seek revenge if it has been mistreated or thrown away.

Object

Yokai

Description

Umbrella

Karakasa-obake (唐傘お化け)

A one-legged umbrella with one eye and a large tongue. Icon of the 'funny' Yokai.

Lantern

Chōchin-obake (提灯お化け)

Paper lantern that tears to reveal a face.

Sandals

Bakezōri

Old straw sandals that run through the house screaming.

Futon

Ittan-momen

Long flying piece of cotton that strangles its victims.

Biwa (lute)

Biwa-bokuboku

Musical instrument that plays itself at night.

The Tsukumogami teach respect for objects. Do not throw away your belongings — or they will come back to haunt you. In a sense, the masks I create at Dai Yokai are destined to become Tsukumogami: durable objects, made of High-Resistance PETG Polymer, which will accumulate your energy over the decades.


8. GIANT YOKAI and SKELETONS

Creature

Japanese

Description

Size

Gashadokuro

がしゃどくろ

Giant skeleton formed from the bones of unburied dead soldiers. Wanders at night making a 'gasha gasha' sound.

15+ meters

Ōmukade

大百足

Giant human-eating centipede. Enemy of the Dragon.

Several dozens of meters

Daidarabotchi

ダイダラボッチ

Giant so immense that his footprints create lakes. The Forest Spirit from Princess Mononoke is inspired by him.

Mountain range

Nue

Chimera: monkey head, raccoon dog body, tiger legs, snake tail. Brings illness and misfortune.

Large


Yokai in Pop Culture — Manga, Anime, Video Games


Yokai are not dusty relics. They are the raw material of modern Japanese pop culture. When you watch an anime or play a Japanese video game, you are interacting with Yokai without knowing it.

Work

Type

Present / Inspired Yokai

Folklore Connection

Spirited Away (Ghibli)

Film

No-Face (Noppera-bō), river spirits, soot sprites, Radish Spirit (Oshira-sama)

Love letter to folklore. The spirit bathhouse = Shinto shrine.

Princess Mononoke (Ghibli)

Film

Kodama (tree spirits), Shishi-gami (Deer God inspired by Daidarabotchi), Mononoke

Nature vs industry — central theme of the folklore

Demon Slayer (Kimetsu no Yaiba)

Manga/Anime

Oni, Kijo (demon women), blood monsters

The demons in the series are modern Oni with blood powers

Jujutsu Kaisen

Manga/Anime

Cursed spirits = Yokai born from human negative emotions. Sukuna = King of Curses (Oni).

Pure Yokai concept: human fears become creatures

Naruto

Manga/Anime

Kyūbi (9-tailed Kitsune = Tamamo-no-Mae), Shukaku (Tanuki), Gamabunta (giant toad)

Each Tailed Beast is a folklore Yokai

Pokémon

Video Game/Anime

Ninetales = Kitsune, Grimer = viscous spirit, Gengar = Yūrei, Lombre = Kappa, Froslass = Yuki-Onna

Pokémon is a disguised Yokai encyclopedia

Nioh / Nioh 2

Video Game

Oni, Tengu, Kappa, Yuki-Onna, Shuten-Dōji, Nue, Ōmukade

The most faithful game to folklore — every boss is a real Yokai

Ghost of Tsushima

Video Game

Onryō, samurai legends, Tengu

Folklore integrated into a historical setting

Ghostwire: Tokyo

Video Game

Kuchisake-onna, Tengu, Rokurokubi, Nurikabe

Tokyo invaded by Yokai — the Hyakki Yagyō concept in a video game

Animal Crossing

Video Game

Tom Nook = Tanuki (obsessed with money, as in the legend)

Yokai disguised as cute characters

GeGeGe no Kitarō

Manga (Mizuki)

Complete encyclopedia: hundreds of Yokai made 'sympathetic'

The work that saved the Yokai from oblivion

Yokai in Irezumi Tattoos

Traditional Japanese tattooing (Irezumi) is one of the oldest arts in the world. And Yokai are the most requested subjects after Dragons.


Table of the most tattooed Yokai and their meaning

Tattooed Yokai

Meaning on the skin

Classic associations

Style

Oni

Brute force, protection, rebellion

Peony flowers (botan), waves, storm clouds

Full-back, full arm

Hannya

Destructive passion, duality, transformation

Cherry blossoms (sakura), snake, flames

Arm, chest, back

Kitsune

Cunning, magic, good/evil duality

Flames (Kitsunebi), torii gate, maple leaves

Arm, thigh

Tengu

Mastered pride, martial discipline

Ginkgo leaves, fan, mountain

Back, arm

Kappa

Humility (the Kappa bows and loses its strength)

Waves, cucumbers

Arm, calf

Gashadokuro

Memento mori, vanity, impermanence

Night, moon, samurai armor

Spectacular full-back

Yuki-Onna

Cold beauty, seductive death, impermanence

Snow, weeping willow, moon

Arm, back

Daruma

Perseverance, resilience, falling and rising

Waves, flames, kanji 七転び八起き

Arm, shoulder

Tebori (hand-poked tattooing) remains the most respected technique for traditional Yokai motifs — the gradients (bokashi) obtained with a manual needle are impossible to reproduce with a machine.


My Artisan Approach — Making the Invisible Visible


From myth to 3D


Ancient descriptions are often vague. 'A red-skinned demon with horns.' That is brief. In my workshop in Plélan-le-Grand, I have to interpret these texts, cross-reference sources (ukiyo-e prints, Noh masks, descriptions from the Konjaku Monogatari), and give volume to these ancestral fears.


I carve the wrinkles of the Oni to show its millennial anger. I smooth the features of the Kitsune to capture its deceptive grace. I refine the horns of the Hannya to emphasize its tragic femininity. And I sculpt the fangs of the Tengu so that it seems on the verge of speaking.


Why PETG and not wood?


I have the deepest respect for the sublime traditional craftsmanship in carved cypress (hinoki) wood. However, an authentic Noh mask demands months of masterful work, wood dried for years, and a budget of several thousand euros. To preserve the precious nature of such wooden masterpieces, they are often kept safely displayed. For the modern collector or the cosplayer who wants to wear their mask at a convention without fear, this cost and the need for delicate handling can be barriers.


Each Dai Yokai mask is printed in high-density PETG, hand-sanded, and then painted using wash techniques, dry brushing, and varnish. PETG allows me to achieve details that papier-mâché cannot reach, while remaining accessible and incredibly rugged for an all-terrain experience.


How to Choose and Display your Yokai


Which Yokai for which profile?

You are...

Your Yokai

Why

Recommended Mask

Athletic, fighter, 'brute force'

Oni

Pure energy, indestructible will

Artistic, emotional, passionate

Hannya

Beauty in pain, emotional complexity

Martial arts practitioner

Tengu

Discipline, mastery, humility in the face of talent

Entrepreneur, merchant

Kitsune

Cunning, prosperity, Inari's messenger

Leader, visionary

Ryū Dragon

Wisdom, nobility, mastery of the elements

Fan of duos / symmetrical decor

Raijin + Fujin

Balance of forces, power of the duo

Horror fan

Kuchisake-Onna

Pure thrill, urban legend incarnate

Determined, seeking a goal

Daruma

Perseverance: falls 7 times, stands up 8

Protector of the home

Komainu / Foo Dog

The sacred guardian, sentinel of temples and homes

Decor placement guide

Location

Ideal Yokai

Effect

Facing the entryway

Oni, Raijin, Komainu

Guardian: 'scares away evil' — tradition of the Onigawara

Desk / Home office

Daruma, Tengu, Kitsune

Motivation + discipline + strategic cunning

Japandi style living room

White Kitsune, Kezurata Hannya

Elegance, mystery, conversation starter

Gaming / manga setup

Oni, Hannya × Berserk, Kuchisake

Wall of masks = perfect collection backdrop

Bedroom

❌ Avoid Oni — too intense

Yuki-Onna or white Kitsune if soft decor

Dojo / gym

Tengu, Oni, Fudo Myō-ō

Strength, discipline, mastery

To go further on staging: The Art of Displaying a Yokai


Frequently Asked Questions (FAQ)


What is the difference between a Yokai, a Yūrei, and a Kami?

The Yokai is the generic term for any supernatural creature from Japanese folklore (Oni, Tengu, Kappa, Kitsune...). The Yūrei is specifically a ghost — the spirit of a dead human who cannot find rest (like Sadako in The Ring). The Kami is a Shinto deity, revered in a shrine. The boundary is porous: Raijin looks like an Oni but is a Kami. A mistreated Yokai can become a Kami if a shrine is built for it.


Do Yokai masks bring bad luck?

No — that is a Western misconception. In Japan, a demon mask (Oni) hung facing the entrance is a lucky charm that scares away evil. This is the tradition of the Onigawara (demon-shaped roof tile). Dai Yokai masks are created with an artistic and protective intention — not to invoke anything.


What is the most dangerous Yokai?

The Japanese recognize three supreme Yokai: the Nihon San Dai Yōkai. Shuten-Dōji (the king of the Oni, man-eater), Tamamo-no-Mae (the 9-tailed Kitsune who wreaked havoc for 3,500 years), and Emperor Sutoku (the most cursed vengeful spirit in Japan). In terms of pure power, Tamamo-no-Mae is probably the most formidable — she destroyed empires on three continents.


What is the difference between a Yokai and a Kaiju?

The Yokai is a spirit or monster from traditional folklore, generally of human or spiritual size. The Kaiju (怪獣, 'strange beast') is a giant monster born from modern science fiction (Godzilla, Mothra). Both share the kanji 怪 (kai = strange), but the Kaiju is a product of the atomic age, not of millennial folklore.


What are the most well-known Yokai in France?

In France, the most recognized Yokai are the Kitsune (fox, popularized by Naruto), the Oni (demon, popularized by Demon Slayer), the Tengu (bird-man, present in Sekiro and Nioh), and the Kuchisake-onna (the Slit-Mouthed Woman, viral on TikTok). The Kappa is also gaining popularity thanks to Animal Crossing and Pokémon.


How many Yokai exist in total?

There is no exact number. Toriyama Sekien cataloged about 200 in his 18th-century encyclopedias. The Wikipedia list records over 400. But oral folklore probably contains thousands — every village, every mountain, every river had its own local Yokai. The Japanese say there are 8 million Kami (Yaoyorozu no Kami); it can be assumed there are at least as many Yokai.


Conclusion — The Parade Continues


Yokai are not relics of a superstitious past. They are alive. They are in every anime you watch, in every video game you play, in every tattoo you admire. They have been the raw material of the Japanese imagination for over a millennium, and they are not about to disappear.

In my workshop, every mask I sculpt is a chapter in this endless story. A red Oni hung on the wall is 1,000 years of fear and fascination compressed into a face. A white Kitsune placed on a shelf is the duality of good and evil captured in porcelain and gold.

So, which Yokai will you invite into your home? The one who protects, the one who terrifies, or the one who tells a story you recognize?

The Night Parade never stops. You just have to open your eyes at the hour of twilight.



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