Oni: Japan's Ogres and Their Many Faces in Folklore

Explore Japan's oni ogres, from horned storybook figures and Setsubun bean throwing to the friendly Namahage visitors of Akita and roof-tile charms.

Published October 17, 2026 at 9:57 PM JST | By Tokyo Paul

Quick answer: Oni are horned ogres of Japanese folklore, usually shown with tusks, bright skin, a tiger-skin loincloth and an iron club. They appear in Setsubun bean throwing, the story of Momotaro and the Namahage visits of Akita, and today they often stand for luck and protection.

As October brings costumes and spooky decorations to many parts of the world, Japan has its own famous horned character with a long and surprisingly warm history: the oni. These ogres have wild hair, sharp tusks, bright skin and an iron club, and they appear in children's tales, festivals, roof tiles and even playground games. Yet the oni is far more varied than its fierce look suggests, because it can be a mischievous rascal, a sacred visitor, a loyal friend or a protective charm. This guide explains where oni come from, what their features mean, how they show up in celebrations and how visitors can spot them across Japan.

What an Oni Looks Like

An oni is usually pictured as a hulking figure with one or more horns, large teeth and clawed hands and feet. Some have a third eye in the forehead, and their skin may be red, blue, black or yellow, which is why artists have so much fun with them. They often wear a tiger-skin loincloth and carry a kanabo, an iron-studded club that has become part of the standard picture. In many stories they can also change shape and appear as ordinary people.

The horns and tiger-skin outfit may have a clever explanation. In traditional Chinese-influenced thinking, the northeast was an unlucky direction called the kimon, or "demon gate," and it was linked with the zodiac pair of ox and tiger. One idea holds that the oni's cow-like horns and tiger-skin clothing are a visual way of showing that direction. It is a lovely example of how a symbol can carry a hidden calendar inside it.

The same northeast idea shaped architecture. The walls of the Kyoto Imperial Palace have a notched northeast corner, which is thought to ward off oni, and temples were sometimes placed with the demon gate in mind. Whether or not every story is exactly right, it shows how thoughtfully people once arranged the world around the idea of protection.

Where the Word and Idea Came From

The word oni has an interesting history. The Chinese character used for it originally referred to ghosts or the spirits of the dead, and in early Japanese the character was read ki. A tenth-century Japanese dictionary offered a different idea, tracing the word to a term meaning "to hide," since these beings were thought to stay out of sight. Over the centuries, the image blended influences from Buddhism, Chinese lore and local belief into the familiar horned figure.

By the Heian and later periods, oni were common characters in stories, scrolls and performances. One of the best known is Shuten-doji, often described as the most famous oni in Japan, whose legend has appeared in art and performance since the fourteenth century. The sword associated with that story, Dojigiri, is today a National Treasure and one of the celebrated Five Greatest Swords Under Heaven. For many visitors to museums, the swords and scrolls are an easy way to meet the oni of history.

Setsubun: Beans for Good Luck

The best-known oni tradition is Setsubun, a festival of seasonal division usually held on February 3, the day before the start of spring in the old calendar. People throw roasted soybeans, called fukumame, out the front door or at a person wearing an oni mask, and shout "Oni wa soto! Fuku wa uchi!" That means "Oni out! Fortune in!" Then they close the door, and the beans are believed to purify the home.

The custom is thought to have started with the aristocracy and samurai in the Muromachi period, and one legend credits a monk on Mount Kurama in the time of Emperor Uda. Today families do it at home, and many shrines and temples hold public bean-throwing events, sometimes with well-known guests such as celebrities or sumo wrestlers. It is a joyful occasion that children especially enjoy. You can read more about the festival in the Setsubun article.

Other Setsubun customs make the day even more fun. Many people eat one bean for each year of their age, plus one more for luck, and some eat an uncut sushi roll called ehomaki while facing the year's lucky direction. A sprig of holly with a sardine head is hung at the door in some homes to keep evil spirits away. All of it is meant to welcome a healthy, happy spring.

Friendly Oni in Stories and Festivals

Not every oni is the villain. In the famous tale of Momotaro, the Peach Boy sets off with a dog, a monkey and a pheasant to an island where oni live, and returns with the treasure. The story is a staple of children's picture books and theater. Yet modern retellings often show oni as complex and sympathetic, and some stories turn the idea on its head altogether.

A beloved example is the tale of the Red Oni Who Cried, in which a blue oni acts so that his friend, the red oni, can win the trust of humans. It is a story about friendship and generosity, and it shows how far the oni's reputation has softened. In festivals across Japan, men in oni costumes often lead parades to dispel bad luck, which turns the ogre into a lucky guide.

Children even play with the idea. Oni gokko is a tag game in which the player who is "it" is the oni, and everyone else runs away laughing. Little traditions like these keep the character close to everyday life.

Namahage and Oni Roof Tiles

One of the most distinctive oni traditions is the Namahage of the Oga Peninsula in Akita Prefecture. On New Year's Eve, men wearing big ogre masks and straw capes visit homes in small groups, carrying wooden pails and knife replicas. They ask, in the local dialect, whether any crybabies or lazy children are around, and families welcome them with hospitality. The visits are rooted in the idea of visiting New Year deities, and parents sometimes ask the Namahage to share a lesson with their kids.

For travelers, the Namahage Sedo Festival, held each February at Shinzan Shrine, is a friendly way to see the tradition. At this event the roles are turned around and the Namahage hand out mochi rice cakes to visitors. Check the official event information before traveling, as schedules can change.

Look up on your walks and you may spot another oni tradition: onigawara, or oni-faced roof tiles. These fierce faces on the ends of temple and house roofs are believed to ward off misfortune, an old case of using an oni to chase away bad luck. It is an elegant idea, since the protector looks just like the thing it keeps out.

Quick Takeaways

Oni are horned ogres of Japanese folklore, linked with the northeast demon gate, tiger-skin loincloths and iron clubs. They star in Setsubun bean throwing, in the story of Momotaro, in the tender tale of the Red Oni Who Cried and in the Namahage visits of Akita. Their image has softened over time, and today they often stand for luck, protection and playful fun.

To enjoy oni culture, try visiting a temple or shrine during Setsubun in early February, browsing museums for oni art and swords, or simply watching roof lines for onigawara. Each little encounter adds a layer to your understanding of how Japan turned a scary idea into a friendly one. Approach the oni with curiosity and a smile, and you will find they have plenty of stories to share.

Frequently Asked Questions

What happens at Setsubun?

Setsubun is usually held on February 3. People throw roasted soybeans out the front door or at someone in an oni mask while shouting that the oni should go out and good fortune should come in. Many also eat one bean for each year of their age, plus one.

Why do oni wear tiger-skin and have horns?

One explanation links the look to the northeast direction called the demon gate, which was tied to the ox and tiger of the zodiac. Cow-like horns and a tiger-skin loincloth may be a visual way of showing that direction.

What are the Namahage?

Namahage are masked men in straw capes from the Oga Peninsula in Akita Prefecture who visit homes on New Year's Eve and playfully ask whether any lazy or crying children live there. In February, a festival at Shinzan Shrine shows the tradition to visitors.

Keep Exploring

More guides from Tokyo Paul: Kojiki: The Ancient Book of Japanese Myths, Bonsai: Japan's Miniature Living Trees and Netsuke: Japan's Tiny Carved Toggles.