Japanese Yokai Names and Meanings: Kappa, Tengu, Oni and More

Yōkai (妖怪) are the supernatural creatures of Japanese folklore, and most of their names describe them plainly: kappa (河童) is "river child", tengu (天狗) is "heavenly dog", and yuki-onna (雪女) is "snow woman".

What you need to know

Japanese Yokai Names and Meanings: Kappa, Tengu, Oni and More

You have probably met yōkai without knowing the word. The fox with nine tails, the red ogre with a club, the turtle-like river creature and the umbrella with one eye all come from old Japanese stories, and anime and games borrow them all the time. Their names are a good vocabulary lesson, because many are made of simple kanji that say exactly what the creature is. Even better, yōkai have left their mark on everyday Japanese. Children playing tag, office workers describing a busy week and diners ordering a cucumber roll are all using yōkai words. This guide gives the literal meaning of ten famous names, the idioms that grew from them, and sentences you can say today.

Yōkai are folklore creatures; yūrei are ghosts of the dead

Kappa means "river child" and tengu means "heavenly dog"

Oni lives on in onigokko, the game of tag

Tengu ni naru means to become conceited

Yōkai, obake, yūrei: three words for the uncanny

English uses "ghost" and "monster" loosely, and Japanese has its own set of words. Yōkai are creatures: they have bodies, habits and favourite foods. Yūrei are the spirits of dead people. Obake comes from the verb bakeru, "to change shape", and is the friendly word that children use for anything spooky.

JapaneseRomajiMeaning
妖怪yōkaisupernatural creature
お化けobakespook, monster (everyday word)
幽霊yūreighost of a dead person
化けるbakeruto change shape, to transform

The big four: kappa, tengu, oni, kitsune

These four appear so often that every Japanese child can draw them. The kappa is a river creature with a dish of water on its head. The tengu is a mountain goblin with a red face and a long nose. The oni is a horned ogre, usually red or blue, carrying an iron club. The kitsune is a real animal, the fox, which in stories gains magical powers with age and can take human form.

Read the kanji and the names open up. Kappa is river plus child. Tengu is heaven plus dog, a name that came from China. A fox that transforms is a bakegitsune, where kitsune becomes gitsune inside the compound.

Four picture cards in a row showing the Japanese names of four famous folklore creatures: the kappa, the tengu, the oni and the fox
Four creatures that every Japanese child knows, each with a name you will also hear in everyday idioms.
JapaneseRomajiMeaning
河童kappariver child
天狗tenguheavenly dog
鬼oniogre, demon
狐kitsunefox, a shape-shifter
化け狐bakegitsuneshape-shifting fox
狸tanukiraccoon dog, a trickster

The tanuki deserves its place beside the fox. It is a real animal, the raccoon dog, and in folklore it is a jolly trickster that changes shape with a leaf on its head. Pottery tanuki statues stand outside many restaurants in Japan.

Names that describe: read the kanji, see the creature

Many yōkai names are plain descriptions. If you know a few basic kanji, you can guess the creature before you see the picture.

JapaneseRomajiMeaning
雪女yuki onnasnow woman
ろくろ首rokurokubiwoman with a stretching neck
座敷童zashiki warashichild spirit of the house
一つ目小僧hitotsume kozōone-eyed boy
からかさ小僧karakasa kozōpaper-umbrella boy

Yuki-onna is yuki, "snow", plus onna, "woman": a pale figure who appears in snowstorms. Rokurokubi joins kubi, "neck", to rokuro, a word for a pulley or a potter's wheel, which is the usual explanation for a neck that winds out to a great length.

Zashiki-warashi is zashiki, a tatami guest room, plus warashi, a regional word for a child. It comes from the folklore of northern Japan, and a house where one lives is said to prosper. Hitotsume-kozō is "one eye" plus kozō, a young monk or simply a boy. Karakasa-kozō is an old oiled-paper umbrella, karakasa, that has come to life with one eye and one leg.

Yōkai words in everyday Japanese

This is where folklore turns into useful vocabulary. Japanese people use these expressions without thinking about monsters at all.

JapaneseRomajiMeaning
鬼ごっこonigokkotag, the chasing game
鬼のようにoni no yō nilike a demon: extremely
かっぱ巻きkappamakicucumber sushi roll
天狗になるtengu ni naruto get conceited
狐につままれるkitsune ni tsumamareruto be completely baffled
狸寝入りtanuki neiripretending to be asleep
鬼に金棒oni ni kanabōmaking the strong even stronger
河童の川流れkappa no kawanagareeven experts make mistakes

In onigokko, the player who chases the others is the oni, just as English says "it". Oni no yō ni makes any description extreme, and young people shorten it further and put oni in front of an adjective as slang for "super".

Kitsune ni tsumamareru literally means "to be pinched by a fox", that is, to feel as if a fox has bewitched you. Oni ni kanabō is "an iron club for an ogre": giving an advantage to someone who was already strong. Kappa no kawanagare is "a kappa carried off by the river": even the best swimmer can slip.

Sentences you can actually say

Here are the idioms in sentences at a polite or friendly level. The first line is the chant from Setsubun in early February, when families throw beans to drive bad luck out of the house.

JapaneseRomajiMeaning
鬼は外、福は内。Oni wa soto, fuku wa uchi.Demons out, good luck in.
今日は鬼のように忙しいです。Kyō wa oni no yō ni isogashii desu.I'm insanely busy today.
かっぱ巻きを一つください。Kappamaki o hitotsu kudasai.One cucumber roll, please.
天狗にならないでね。Tengu ni naranaide ne.Don't let it go to your head.
誰が鬼?Dare ga oni?Who's "it"? (casual)
好きな妖怪は何ですか。Suki na yōkai wa nan desu ka.What's your favourite yokai?

Foxes and tanuki on the menu

Two yōkai animals appear on noodle shop menus all over Japan. Kitsune udon is udon topped with sweet fried tofu, which is said to be the fox's favourite food. Tanuki udon or tanuki soba usually comes with crunchy bits of tempura batter, though what the name means changes from region to region.

Foxes also have a serious side. They are the messengers of Inari, the deity of rice and business, and stone foxes guard Inari shrines across the country. So the same word, kitsune, can point to a trickster in a story, a statue at a shrine or a bowl of noodles.

Where you will meet yōkai in anime and games

The classic yōkai manga is GeGeGe no Kitarō by Shigeru Mizuki, which made many old creatures familiar to modern children, and Yo-kai Watch did the same for a later generation. In Demon Slayer, known in Japan as Kimetsu no Yaiba, the enemies are oni. Naruto is built around a fox with nine tails.

Games are full of them, too. In Animal Crossing, the shopkeeper Tom Nook is a tanuki and the boatman Kapp'n is a kappa. Mario's Tanooki Suit is named after the tanuki. Several Pokémon are commonly linked to yōkai, such as the fox with many tails. Once you know the originals, you will notice the references everywhere.

Key points

A practical way to improve

Yōkai idioms are short and vivid, so they are easy to try in speech. First, describe one yōkai aloud in three simple sentences: what it looks like, where it lives and what it does. Second, make a true sentence about your week with oni no yō ni, such as kyō wa oni no yō ni isogashii desu. Third, in Unihongo's immersive 3D classroom, ask your AI Sensei to play a friend who loves folklore, and ask which yōkai they like and why, then answer the same question; the session report afterwards lists corrections and vocabulary. Both yōkai and yūrei depend on long vowels, so choose a long vowel drill in the pronunciation lab; a shortened vowel makes either word hard to recognise.

  1. 1

    Choose one clear goal

    Focus each session on a situation or skill you can actually use.

  2. 2

    Practice actively

    Say complete answers aloud instead of only reading or recognizing Japanese.

  3. 3

    Review and repeat

    Keep useful corrections and revisit the same skill until it feels natural.

FAQ

Frequently asked questions

What does yokai mean?

Yōkai (妖怪) is written with two kanji that both suggest something eerie and mysterious. It covers the whole range of supernatural creatures in Japanese folklore: monsters, tricksters, shape-shifting animals and objects that come to life. Some are frightening and many are simply mischievous.

What is the difference between yokai and yurei?

A yūrei (幽霊) is the ghost of a dead person, usually tied to a grudge or a sorrow. A yōkai is a creature in its own right and was never human. Obake is a loose everyday word, common with children, that can cover both.

What does kappa literally mean?

Kappa is written 河童: river plus child. The creature is imagined as child-sized, with a shell on its back and a dish of water on its head, living in rivers and ponds. The word is usually written in kana in daily life.

Why is a cucumber roll called kappamaki?

Because cucumbers are said to be the favourite food of the kappa. Maki means "roll", so kappamaki is the kappa's roll. It is one of the most basic items at any sushi restaurant, and the name is used without any thought of monsters.

What does tengu ni naru mean?

It means to become conceited, literally "to become a tengu". The tengu is famous for its long nose, and in Japanese a proud person is said to have a high nose. The phrase is used about someone whose success has gone to their head.

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