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Japanese folklore is filled with horned giants, transforming foxes, birdlike mountain beings, river creatures, snow women, living umbrellas, haunted lanterns, mysterious lights, and invisible walls.
English websites often group all of them together as:
Japanese demons
Japanese spirits
Japanese mythical creatures
yokai
Yokai is a broad Japanese category for uncanny supernatural beings and phenomena, but Japanese folklore also includes ghosts, kami, legendary animals, dragons, devils, and other beings that may be described separately.
A yokai may look like a monster, human, animal, old tool, light, sound, wall, or natural phenomenon.
Some yokai are frightening, while others are funny, helpful, sacred, mischievous, protective, tragic, or morally unpredictable.
Famous examples include oni, kitsune, tengu, kappa, tanuki, yuki-onna, bakeneko, rokurokubi, zashiki-warashi, nurikabe, and tsukumogami.
This beginner-friendly guide explains what yokai are, how they can be classified, which creatures are most famous, and how older folklore differs from modern anime and games.
What Is a Yokai?
妖怪 (yōkai) is a broad word for strange, mysterious, supernatural, or uncanny beings and phenomena in Japanese folklore.
Hiragana: ようかい
Romaji: yōkai / yokai
Basic meaning: a supernatural, mysterious, or uncanny being or phenomenon
The word does not identify one body type, species, religion, moral alignment, or level of power.
A yokai can be:
・a humanoid mountain or water being
・a person transformed by emotion or supernatural influence
・an old object that has come alive
・a named sound, light, wind, or obstruction
・a frightening monster
・a harmless prankster
・a local guardian or bringer of fortune
An invisible wall, a mysterious echo, or a living musical instrument can also be treated as a yokai.
For a deeper explanation of the word itself, see Yokai Meaning: Types of Yōkai and Their Role in Anime.
Are Yokai the Same as Japanese Mythical Creatures?
Japanese mythical creatures is a useful English search phrase, but it is not one exact Japanese category.
・yokai
・oni
・yūrei or ghosts
・kami and sacred animals
・dragons
・legendary heroes and beasts
・Buddhist or religious beings
・creatures introduced from Chinese, Indian, or other traditions
・modern fantasy beings inspired by older folklore
Inside the article, however, we can learn the more precise Japanese categories rather than assuming every supernatural character is the same kind of being.
How Many Types of Yokai Are There?
There is no single official number or universally accepted classification system.
Yokai stories developed across many centuries, regions, villages, temples, shrines, religious traditions, literary works, paintings, performances, manga, anime, and games.
It is better to think of yokai culture as a growing library of stories rather than one closed bestiary.
For study purposes, we can organize yokai by:
Habitat — mountain, water, house, road, snow, sea
Origin — transformed animal, dead person, old object, emotion, unexplained event
Behavior — helper, trickster, attacker, guardian, warning figure
Modern role — enemy, companion, collectible character, fantasy race
Type 1: Humanoid Yokai
Humanoid yokai resemble people but have supernatural bodies, powers, identities, or transformations.
Tengu (天狗) — mountain beings associated with birds, flight, yamabushi, and pride
Yuki-onna (雪女) — a mysterious woman associated with snow and deadly cold
Rokurokubi (ろくろ首) — a person whose neck stretches unnaturally
Futakuchi-onna (二口女) — a woman with a second mouth behind her head
Yamauba (山姥) — a supernatural mountain woman, sometimes dangerous and sometimes nurturing
The person may reveal a hidden mouth, extend a neck, survive impossible cold, disappear, transform, or show knowledge no human should possess.
Oni: The Horned Japanese Demon or Ogre
Oni are commonly shown with horns, fangs, colored skin, enormous strength, tiger-skin clothing, and an iron club.
They may punish sinners, attack humans, guard a place, represent misfortune, or become heroes and comic characters in modern fiction.
a demon- or ogre-like being from Japanese folklore
Do not assume:
that oni are identical to the Christian Devil or that every oni is completely evil
Read the full article: Oni Meaning: Japanese Demons and Oni Masks.
Tengu: Long-Nosed and Birdlike Mountain Beings
Tengu are associated with mountains, flight, wings, bird faces, long noses, yamabushi clothing, feather fans, martial knowledge, and pride.
High-ranking daitengu are often shown with human faces and long noses, while karasu-tengu have birdlike beaks.
dangerous spirit, mountain guardian, religious challenger, supernatural teacher
Tengu in language:
天狗になる = to become conceited
Read the full article: Tengu Meaning: Tengu Masks and Japanese Folklore.
Type 2: Animal Yokai and Shapeshifters
Many Japanese animal stories describe creatures gaining intelligence, magical power, long life, or the ability to take human form.
Tanuki (狸) — raccoon dogs famous for playful transformations and tricks
Bakeneko (化け猫) — transformed or supernatural cats
Nekomata (猫又) — cat yokai often shown with divided tails
Mujina (狢) — a term appearing in stories about badgers, raccoon dogs, or shapeshifting creatures
Jorōgumo (絡新婦) — a spider being that may transform into a woman
Hebi or snake beings — creatures associated with water, jealousy, transformation, fertility, or sacred places
Age, unusual behavior, transformation, local belief, and storytelling tradition may all contribute differently.
Kitsune: Ordinary Fox, Shapeshifter, or Inari Messenger?
The basic Japanese meaning of kitsune is simply fox.
In folklore, however, a kitsune may transform into a person, create illusions, produce fox-fire, trick humans, repay kindness, marry a human, or appear in connection with Inari worship.
Read the full article: Kitsune Meaning: Fox Spirits, Food, Tattoos, and Anime.
Tanuki: The Japanese Raccoon Dog Trickster
A tanuki is a real raccoon dog, not a raccoon.
Folkloric tanuki may transform, imitate people, play tricks, make music, bring luck, or appear as humorous and earthy characters.
clever, elegant, mysterious, spiritual, dangerous, or seductive
Tanuki image:
playful, humorous, earthy, deceptive, generous, or lucky
These are broad tendencies, not fixed personality rules.
Type 3: Water Yokai
Rivers, ponds, wells, coasts, and seas are dangerous and unpredictable. Japanese folklore gives many water dangers a memorable supernatural form.
Umibōzu (海坊主) — huge dark apparitions appearing at sea
Funayūrei (船幽霊) — ghostly beings that threaten boats and sailors
Iso-onna (磯女) — a dangerous woman associated with rocky coasts
Ningyo (人魚) — Japanese mermaid-like beings whose stories differ from modern Western mermaids
Ushi-oni (牛鬼) — ox-headed or monstrous beings sometimes associated with coasts, rivers, and local festivals
Kappa: The Most Famous River Yokai
Kappa are often shown with turtle-like shells, webbed limbs, beaks, and a water-filled dish on the head.
Stories may describe them as dangerous attackers, pranksters, sumo lovers, helpful workers, or beings bound by rules and promises.
But kappa stories also became entertainment, local identity, religious imagery, and comic culture.
Umibōzu: The Sea Monk
Umibōzu are enormous dark beings or phenomena that appear on the sea, often threatening ships.
Their name combines umi, sea, and bōzu, monk or bald-headed man.
Different stories explain the being in different ways.
Type 4: Mountain, Forest, and Snow Yokai
Yamauba — a supernatural mountain woman
Yamawarawa / Yamawaro — child-sized mountain beings in regional traditions
Kodama — mysterious presences or spirits connected with trees and echoes
Yuki-onna — a beautiful and dangerous snow woman
Kamaitachi — weasel-like beings associated with sudden cutting winds
Satori — a mountain being said to read human thoughts
They naturally became boundaries between ordinary human life and a powerful other world.
Yuki-onna: The Snow Woman
Yuki-onna appears in snowy landscapes, often as a beautiful woman whose breath or touch can freeze people.
Some versions make her a deadly predator, while others give her tragic love stories or rules that allow a human to survive.
The familiar modern image combines several traditions rather than one final canon.
Type 5: Household and Place-Based Yokai
Some yokai belong to one home, room, road, field, gate, bridge, or village.
Nurikabe (ぬりかべ) — an invisible or wall-like obstruction blocking a traveler
Mokumokuren (目目連) — many eyes appearing in damaged paper screens
Azukiarai (小豆洗い) — a mysterious presence or sound of washing red beans
Sunekosuri (すねこすり) — a small creature rubbing against travelers’ legs
Toire no Hanako-san — a modern school ghost or urban-legend figure associated with a restroom
The example shows that supernatural folklore continues to develop in modern settings.
Type 6: Object Yokai and Tsukumogami
Old tools and household objects can become supernatural characters in Japanese art and storytelling.
Karakasa-obake (唐傘お化け) — a one-eyed umbrella creature
Chōchin-obake (提灯お化け) — a lantern with a face
Biwa-bokuboku (琵琶牧々) — a biwa instrument transformed into a yokai
Koto-furunushi (琴古主) — a supernatural koto instrument
Seto-taishō (瀬戸大将) — a warrior assembled from pieces of ceramic ware
Texts and images differ, and artists often personified tools creatively.
The National Diet Library’s Hyakki Yagyō Emaki materials show a night parade largely populated by animated everyday tools and utensils.
Type 7: Phenomenon-Type Yokai
Some yokai begin not as creatures but as named experiences.
Onibi (鬼火) — ghostly fire
Hitodama (人魂) — floating lights associated with human souls
Yamabiko (山彦 / 幽谷響) — a mountain echo imagined as a being or phenomenon
Kamaitachi — sudden cuts associated with wind
Nurikabe — the experience of an unseen wall blocking a road
Shiranui (不知火) — mysterious lights seen over the sea in regional tradition
In other words, the phenomenon becomes a character.
Type 8: Transformed Humans and Emotion-Based Beings
Some Japanese supernatural stories focus on a human whose body or spirit changes through jealousy, rage, grief, obsession, broken vows, or religious failure.
Kiyohime — a woman who becomes a giant serpent in the Dōjōji tradition
Onryō (怨霊) — vengeful spirits driven by resentment
Oni transformations — humans becoming demon-like through evil, punishment, or overwhelming emotion
Tengu realm traditions — proud or misguided religious figures becoming tengu in some medieval beliefs
Transformation makes an inner emotion visible to an audience.
Famous Japanese Yokai: Beginner List
1. Oni — horned ogre- or demon-like being
2. Kitsune — fox; in folklore, a magical shapeshifter
3. Tengu — birdlike or long-nosed mountain being
4. Kappa — river creature with a dish on its head
5. Tanuki — transforming raccoon dog trickster
6. Yuki-onna — mysterious snow woman
7. Rokurokubi — long-necked human-like yokai
8. Bakeneko — supernatural transformed cat
9. Nekomata — cat yokai often shown with two tails
10. Zashiki-warashi — child-like household presence
11. Nurikabe — invisible or wall-like road obstruction
12. Karakasa-obake — one-eyed living umbrella
13. Chōchin-obake — living paper lantern
14. Umibōzu — giant dark sea apparition
15. Jorōgumo — spider shapeshifter
16. Kamaitachi — cutting-wind weasel being
17. Satori — mountain being that reads thoughts
18. Futakuchi-onna — woman with a second mouth
19. Yamauba — supernatural mountain woman
20. Mokumokuren — many eyes appearing in paper screens
Yokai — the broad category
Oni — the horned demon- or ogre-like being
Kitsune — the fox and supernatural shapeshifter
Tengu — the mountain being linked with birds and pride
Those four terms make many anime and folklore references much easier to understand.
Yokai vs Yūrei: Yokai and Ghosts
A broad supernatural being or phenomenon. It does not have to be a dead human.
Yūrei (幽霊)
The ghost or apparition of a deceased person.
A snow woman, demon woman, transformed animal, or modern horror character may look similar without being an ordinary human ghost.
Yokai vs Kami: Supernatural Does Not Always Mean Yokai
A deity, sacred presence, or divine power that may be worshipped or enshrined.
Yokai (妖怪)
A strange or uncanny supernatural being or phenomenon, often feared, explained, avoided, joked about, or represented in stories.
The boundary can be flexible. A local mountain or water being may be feared in one story and revered in another tradition.
Do not expect every source to draw the same border.
Yokai vs Oni vs Akuma
The broad supernatural category.
Oni
A particular horned, powerful, ogre- or demon-like being.
Akuma
A devil or evil demon, often used in religious or Western-influenced fantasy settings.
The same English word can hide several different Japanese words. Check the original term when the distinction matters.
Yokai vs Obake, Bakemono, Mononoke, and Ayakashi
Obake — apparition, ghost, transformed being, or “scary thing,” depending on context
Bakemono — monster or transformed creature
Mononoke — uncanny or harmful spiritual presence; often older or literary in tone
Ayakashi — mysterious supernatural being or phenomenon; meaning varies by source and fictional work
Learn the other words through the exact stories and sentences where you encounter them.
Are Yokai Good or Evil?
Yokai do not fit neatly into one good-versus-evil system.
・a predator
・a prankster
・a punisher
・a warning about danger
・a household bringer of fortune
・a protector of a mountain or village
・a grateful helper
・a lonely or tragic outsider
・an explanation for an unusual event
・a comic character
The same named being may behave differently by region, period, storyteller, or adaptation.
Why Did People Tell Yokai Stories?
Yokai stories can serve several purposes at once.
strange noises, lights, illness, disappearances, weather, or accidents
Warning about danger
deep water, mountains, storms, night travel, abandoned buildings
Teaching social behavior
respect promises, avoid greed, do not mistreat strangers, animals, tools, or sacred places
Expressing emotion
anger, grief, jealousy, loneliness, fear, resentment
Entertaining audiences
scary stories, humorous illustrations, theater, games, festivals
Giving identity to a place
local legends, tourism, mascots, festivals, community memory
Fear, belief, humor, art, religious practice, skepticism, and entertainment could all exist together.
Hyakki Yagyō: The Night Parade of One Hundred Yokai
百鬼夜行 (hyakki yagyō) is the famous image of countless supernatural beings traveling together through the night.
鬼 (ki / oni) — demon, spirit, or supernatural being in this compound
夜行 (yagyō) — traveling at night
百鬼夜行
the night parade of a multitude of supernatural beings
The number one hundred suggests a vast supernatural multitude rather than a carefully counted group.
The National Diet Library’s illustrated scroll presents numerous creatures parading through Kyoto at night, many of them animated tools and utensils known as tsukumogami.
How Yokai Became Recognizable Characters
Many supernatural experiences and local beings did not originally have one fixed appearance.
Artists helped turn invisible or variable phenomena into memorable characters.
↓
People give it a name and story
↓
Artists draw a visible form
↓
Later artists repeat or change the design
↓
Manga, anime, games, and tourism create new versions
Toriyama Sekien’s illustrated yokai books were especially influential. His first collection, Gazu Hyakki Yagyō, appeared in 1776 and was followed by three related books.
Later ukiyo-e artists such as Utagawa Kuniyoshi and Tsukioka Yoshitoshi also created striking yokai images, often drawing on or reinterpreting earlier designs.
Yokai culture has always combined inheritance with invention.
Yokai in Anime, Manga, and Games
Modern entertainment may preserve an old name while completely redesigning the being.
・battle enemies
・collectible companions
・romantic partners
・school students
・organized clans or kingdoms
・summoned spirits
・cute mascots
・tragic outsiders
・superhero-like protectors
・species with precise ranks and power levels
Famous Yokai-Focused Anime
A foundational modern yokai series featuring many traditional creatures as recurring characters.
Natsume’s Book of Friends
Explores emotional relationships between humans and supernatural beings.
Yo-kai Watch
Reimagines yokai as distinctive characters influencing everyday behavior.
InuYasha
Uses the Japanese word yokai in a fantasy world where English translations often prefer “demon.”
After meeting a character, compare the anime version with older regional, literary, religious, and artistic sources.
How to Analyze a Yokai Character in Anime
Is it called yokai, oni, yūrei, kami, akuma, ayakashi, or something invented?
2. Identify traditional motifs.
Horns, fox tails, feather fans, water dishes, masks, lanterns, snow, long necks.
3. Separate folklore from fictional rules.
Power levels, clans, school systems, romance, and weaknesses may be original.
4. Check the translation.
“Demon” or “spirit” may simplify several different Japanese words.
5. Compare more than one source.
Folklore itself varies by region and period.
Common Beginner Mistakes About Yokai
Mistake 1: Calling Every Supernatural Being a Yokai
A character may instead be a yūrei, kami, akuma, dragon, Buddhist being, urban legend, or original fantasy species.
Mistake 2: Translating Every Yokai as Demon
“Demon” may make a morally ambiguous helper sound completely evil.
Mistake 3: Treating Yokai as One Biological Species
Yokai is a cultural and narrative category, not a scientific taxonomy.
Mistake 4: Assuming Every Version Is Identical
A kappa, tengu, kitsune, or snow woman may behave differently in another region or work.
Mistake 5: Treating Anime Rules as Ancient Tradition
Modern works often create precise systems that did not exist in older folklore.
Mistake 6: Assuming Every Yokai Is Ancient
Some forms are modern urban legends, artistic creations, or recently standardized popular images.
Mistake 7: Assuming Scary Means Evil
A fierce face may punish wrongdoing, protect a place, or drive away another harmful force.
“Yokai are uncanny supernatural beings and phenomena in Japanese folklore, ranging from monsters and shapeshifting animals to living objects and mysterious events.”
Japanese Yokai Vocabulary
怪異 (kaii) — mysterious or supernatural event
怪談 (kaidan) — supernatural or ghost story
幽霊 (yūrei) — ghost of a deceased person
鬼 (oni) — ogre- or demon-like being
化け物 (bakemono) — monster or transformed being
お化け (obake) — apparition, ghost, or scary transformed being
付喪神 (tsukumogami) — old object become supernatural
百鬼夜行 (hyakki yagyō) — night parade of supernatural beings
妖怪退治 (yōkai taiji) — defeating or exterminating yokai
妖怪図鑑 (yōkai zukan) — illustrated yokai encyclopedia
化ける (bakeru) — to transform or disguise oneself
How to Use Yokai in Japanese Sentences
妖怪がいる — “There Is a Yokai”
この森には妖怪がいると言われています。
Kono mori ni wa yōkai ga iru to iwarete imasu.
It is said that a yokai lives in this forest.
妖怪が出る — “A Yokai Appears”
夜になると、この橋に妖怪が出るらしい。
Yoru ni naru to, kono hashi ni yōkai ga deru rashii.
Apparently, a yokai appears at this bridge at night.
妖怪に化ける — “Transform into a Yokai”
古い道具が妖怪に化けた。
Furui dōgu ga yōkai ni baketa.
The old tool transformed into a yokai.
妖怪を退治する — “Defeat a Yokai”
武士は村を守るために妖怪を退治した。
Bushi wa mura o mamoru tame ni yōkai o taiji shita.
The warrior defeated the yokai to protect the village.
妖怪の伝説 — “A Yokai Legend”
この地域には河童の伝説が残っています。
Kono chiiki ni wa kappa no densetsu ga nokotte imasu.
A kappa legend remains in this region.
FAQ About Japanese Yokai
What is a yokai?
A yokai is an uncanny supernatural being or phenomenon in Japanese folklore. Yokai can be monsters, shapeshifting animals, human-like beings, living objects, lights, sounds, or mysterious events.
What are the main types of yokai?
Practical categories include humanoid yokai, animal shapeshifters, water beings, mountain and snow beings, household yokai, object yokai, phenomenon-type yokai, and transformed humans.
What are the most famous Japanese yokai?
Famous examples include oni, kitsune, tengu, kappa, tanuki, yuki-onna, bakeneko, nekomata, rokurokubi, zashiki-warashi, nurikabe, and tsukumogami.
Are yokai demons?
Some are demon-like, but yokai is broader than “demon.” Many are playful, helpful, protective, tragic, or morally ambiguous.
Are yokai ghosts?
Not necessarily. A deceased human’s ghost is usually called a yūrei. Many yokai were never human.
Are oni yokai?
Oni are commonly included within broad discussions of yokai, but oni are a particular type of powerful ogre- or demon-like being.
Is a kitsune a yokai?
An ordinary kitsune is simply a fox. A supernatural transforming fox may be described as a yokai, while a revered Inari fox messenger has a specifically religious context.
Is a tengu a yokai?
Yes. Tengu are mountain-associated supernatural beings commonly included among yokai.
Are all yokai evil?
No. They may attack, trick, help, protect, punish, warn, entertain, or bring fortune depending on the story.
How many yokai are there?
There is no official final number. Regional traditions, historical sources, alternate names, artistic inventions, and modern urban legends make the category open-ended.
What is the difference between yokai and kami?
Kami are sacred or divine beings and powers that may be worshipped. Yokai emphasize the strange and uncanny, although the boundary can vary by tradition.
Why are yokai popular in anime?
They provide memorable visual designs, flexible moral roles, local legends, supernatural powers, and themes involving nature, fear, memory, identity, prejudice, and coexistence.
How do you write yokai in Japanese?
Yokai is written 妖怪 in kanji and ようかい in hiragana.
Summary: Japanese Yokai and Mythical Creatures
Yokai are uncanny supernatural beings and phenomena in Japanese folklore.
● Yokai are not one species
They can be people, animals, objects, sounds, lights, walls, winds, monsters, or local guardians.
● Useful types
Humanoid, animal, water, mountain, household, object, phenomenon, and transformed-human yokai.
● Four key terms
Yokai = the broad category
Oni = horned demon- or ogre-like being
Kitsune = fox; sometimes a supernatural shapeshifter
Tengu = birdlike or long-nosed mountain being
● Related categories
Yūrei = ghost of a deceased person
Kami = sacred or divine being/power
Akuma = devil or evil demon
● Moral role
Yokai may be dangerous, helpful, playful, protective, tragic, or morally unpredictable.
● Anime usage
Anime may preserve traditional motifs while inventing new appearances, powers, societies, and rules.
Start with its Japanese name, learn its core image, and then ask how that particular story reinterprets it.
Explore the Four Core Guides
- Yokai Meaning: Types of Yōkai and Their Role in Anime
- Oni Meaning: Japanese Demons and Oni Masks
- Kitsune Meaning: Fox Spirits, Food, Tattoos, and Anime
- Tengu Meaning: Tengu Masks and Japanese Folklore
References
- National Diet Library Image Bank: Toriyama Sekien’s Illustrated Night Parade of the Demon Horde — Sekien’s four yokai books and examples including kappa, kitsunebi, tengu, rokurokubi, umibōzu, and tsukumogami.
- National Diet Library Image Bank: Hyakki Yagyō Emaki — the night parade and animated tools and utensils.
- National Diet Library Image Bank: Yokai Drawn by Toriyama Sekien — image list including tengu, kappa, nekomata, kitsunebi, kamaitachi, and jorōgumo.
- National Diet Library Authorities: 妖怪 — official subject heading, variants, broader and narrower terms.
- Kotobank: 妖怪 — dictionary and encyclopedia definitions.
- Kanjipedia: 妖.
- Kanjipedia: 怪.
- Michael Dylan Foster, The Book of Yokai: Mysterious Creatures of Japanese Folklore, University of California Press, 2015.
- Michael Dylan Foster, Pandemonium and Parade: Japanese Monsters and the Culture of Yōkai, University of California Press, 2009.
- Kazuhiko Komatsu, An Introduction to Yōkai Culture: Monsters, Ghosts, and Outsiders in Japanese History, Japan Publishing Industry Foundation for Culture, 2017.