Tradition: Japanese Mythology
Alternative Names: Tontari Maō, Greedy Demon King
Category: Demon

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The Myth

No physical appearance is given for Tontari Maō in the surviving account.

After Emperor Jimmu had pacified the barbarian enemies of Japan, the country was governed peacefully for generations. A demon king who coveted Japan was unable to invade and was forced to live in solitude off the coast of Chiguraka, at the boundary between China and Japan.

Eventually, however, disorder began to spread throughout the country. Seeing his opportunity, the Demon King invaded Japan with tens of thousands of demons and evil gods. He defeated the Kongo God and occupied the renowned Mount Kongo, declaring himself the Greedy Demon King. He then began transforming the land into a realm of demons. Clouds and fog covered the sky, storms caused the mountains and rivers to overflow, floods devastated the country, and plague spread throughout the land.

Amida Buddha of the Pure Land saw the suffering of living beings and decided to subdue the demons. He constructed a magnificent jade ship shaped like a phoenix, raised brocade sails, and departed from paradise accompanied by countless Buddhas and gods. The ship traveled through the western countries and then through China, where it gathered holy figures including Emperor Wenchang and King Wenxuan. It crossed the Milky Way and passed through the heavenly realms before reaching Takamagahara. There, accompanied by Amaterasu and the other gods, it descended upon Mount Kongo.

When the Greedy Demon King saw the Buddhas descending, he summoned clouds, mist, wind, and rain and turned the mountain into a fortress. The Three Treasures God, protector of the Buddhas, appeared at the summit and unleashed lightning, setting the vegetation on fire. The demons attempted to extinguish the flames with rain, but failed, and even the Demon King’s mansion was burned down.

The Demon King’s army fled toward the river. The Three Treasures God dammed the river mouths on all four sides, while water poured down from the Milky Way until the mountain was transformed into a sea. Unable to withstand the raging waters, the Demon King returned to the mountaintop.

Tontari Maō and the Three Treasures God then fought each other with sacred swords. Marishiten, Bishamonten, and Fudō Myōō came to the aid of the Three Treasures God, while the Demon King’s allies joined the battle. The Gale Demon King attacked Fudō Myōō, the Fierce Lion Demon King attacked Bishamonten with an axe, and the Heavenly Dragon Demon King struck Marishiten with an iron club.

After a fierce battle, all of the Demon Kings except Tontari Maō were defeated and disappeared. The Three Treasures God’s eight-directional sword flashed like lightning and cut down the remaining demons one after another. The surviving demons fled, but billions of treasure arrows fired from a thousand-pound divine bow struck them, wounding tens of thousands and forcing them toward the open sea.

Tontari Maō, however, turned back toward the mountains with tens of thousands of his followers. He bowed before the Three Treasures God, confessed his former wrongdoing, and vowed from that moment onward to change his ways and obey the Buddha and the gods.

The Three Treasures God accepted their repentance and instructed them not to hesitate to correct their mistakes, but instead to change their ways and accumulate good deeds. He promised to report their repentance to Amida Buddha, have their sins removed, and make them his followers.

The repentant demons were overcome with emotion and chanted “Namu Amida Butsu” together. Amida Buddha then descended in the phoenix-shaped ship, accompanied by numerous Buddhas and gods. The light of Buddha illuminated the entire land, and Tontari Maō attained enlightenment through the virtue of Buddha.

He then vowed to bestow blessings upon devout practitioners even while naked and became the “Original God of Poverty.” The place where this deity stood was thereafter called Naked Forest.

Mount Kongo, meanwhile, came to be called Kojin-yama after Sanbō Kojin, and eventually Funagata-yama because of the arrival of the phoenix-shaped ship.

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Sources

Takahashi, Toshihiro. “貪多利魔王 [とんたりまおう] (Tontari Maō).” 新版TYZ 妖怪図鑑 (New TYZ Yokai Encyclopedia). December 8, 2018. https://tyz-yokai.blog.jp/archives/1073154559.html

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Tradition: Japanese Mythology
Alternative Names: Akiya Akuzaemon, Akuzaemon
Category: Demon

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The Myth

Akiya Akuzaemon is a hulking demon with thick eyebrows and round eyes. He wears a plain kimono with a white collar and plain hakama worn high around the waist. His voice seems to echo from deep within the earth.

Akuzaemon appears in Izumi Kyōka’s 1908 novel Kusa Meikyū (Grass Labyrinth). He is an Akuzaemon, a type of demon said to dwell in “the blink of an eye of a human.” Several Akuzaemons haunt Akiya Residence, a mansion feared because five people connected to the Tsuruya family had died there one after another.

A wandering ascetic monk named Kojiro Hoshi stays at the abandoned mansion to pray for the dead. At the same time, a young man named Akira Hagoshi has taken refuge there while searching for a childhood hand-clapping song once sung by his deceased mother. Strange phenomena repeatedly occur around him: tatami mats jump by themselves, knives disappear, lanterns float in the air, loud crashes echo through the house, and even eggplants in a bowl make strange noises.

The Akuzaemons are responsible for these disturbances. They attempt to frighten Akira into leaving the mansion, even causing him to dream that he has poisoned Kojiro Hoshi. In the dream, however, Akira repents and attempts to take his own life, causing their plan to fail.

Akuzaemon eventually appears before Kojiro Hoshi and introduces himself as the Akuzaemon of Akiya. He has been protecting a young woman named Ayame, who has been possessed by a demon and has been staying within the mansion. Ayame decides to leave and asks Akuzaemon to arrange one final meeting with the monk.

Ayame appears before Kojiro Hoshi and sings the childhood temari ball song that Akira has desperately wanted to hear. She explains that she cannot meet Akira directly because doing so would draw him into the same supernatural situation that has overtaken her. She also says that Akira’s mother, who is in heaven, continues to worry about him and pray for him from among the clouds.

After singing, Ayame prepares to leave before Akira awakens from his dream. She is accompanied by a young girl with a rabbit’s face and a lady-in-waiting with a dog’s face. When Akira awakens and tries to cling to Ayame, Akuzaemon reappears and shouts for them to be allowed through. The yokai board a boat that suddenly appears in the garden.

Ayame disappears behind the boat’s curtain. With Akuzaemon’s sleeve serving as a sail, the boat is carried away by the wind and disappears from Akiya Residence.

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Sources

Takahashi, Toshihiro. “秋谷悪左衛門 [あきやあくざえもん] (Akiya Akuzaemon).” 新版TYZ 妖怪図鑑 (New TYZ Yokai Encyclopedia). July 25, 2015. https://tyz-yokai.blog.jp/archives/1034642612.html

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Tradition: Japanese Mythology
Alternative Names: Ouma, King Demon
Category: Demon

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The Myth

Ouma is a demon-like yokai whose entire body is covered in a substance resembling neither a straw cloak nor fur. It has two horns on its head, white hair, a pointed mouth, and long red claws. Something resembling wings extends from its back.

Ouma is a type of yokai sometimes depicted in Japanese picture scrolls of various monsters. It is particularly known from the Hyakuyōzu, a picture scroll produced around the end of the Edo period that depicts forty-eight types of yokai.

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Sources

Takahashi, Toshihiro. “王魔 [おうま] (Ōma).” 新版TYZ 妖怪図鑑 (New TYZ Yokai Encyclopedia). August 1, 2016. https://tyz-yokai.blog.jp/archives/1059827009.html

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Tradition: Japanese Mythology
Alternative Names: Oni Hitokuchi, Kamikakushi
Category: Demon

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The Myth

Oni hitokuchi describes an oni that devours a person in a single bite, leaving no trace of the victim behind. When someone disappears suddenly without leaving any evidence, such a disappearance may be attributed to evil spirits. A person carried away by spirits into the other world is said to have experienced kamikakushi, or being spirited away. Some victims eventually return, sometimes many years later and profoundly changed, while others never return at all because they were believed to have been eaten by an oni.

A famous example appears in the Heian-period story collection Ise monogatari. The poet and playboy Ariwara no Narihira desired a beautiful and high-ranking noblewoman named Fujiwara no Takaiko. Because of her social position, the two could not have a legitimate relationship and were forced to conduct their affair secretly.

One night, unhappy with their situation, Narihira secretly entered Takaiko’s room and kidnapped her. He fled with her into the wilderness, but a terrible storm suddenly struck. They found a cave and took shelter inside it. Takaiko remained deep in the cave while Narihira stood guard at the entrance with his bow and arrows.

When morning came and the storm had passed, Narihira went into the cave to retrieve Takaiko. She was gone. An oni living inside the cave had eaten her in a single bite, leaving not even a piece of her behind. Her screams during the night had been completely drowned out by the sound of the storm.

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Sources

“Onihitokuchi.” Yokai.com: The Japanese Yokai Encyclopedia. Accessed September 12, 2026. https://yokai.com/onihitokuchi/

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Tradition: Japanese Mythology
Alternative Names: Amanojaku, Amajaku, 天邪鬼
Category: Demon

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The Myth

Amanojaku are wicked supernatural beings described as evil kami, minor oni, or yōkai. They are mischievous and malicious, particularly known for provoking people into acting upon the wicked and impious desires hidden within their hearts. Wherever they go, they spread spiritual pollution.

Amanojaku are also associated with ancient Japanese myths of wicked deities. Amanozako, Amenosagume, and Amenowakahiko all possess characteristics resembling the undermining nature of the Amanojaku, and they are commonly regarded as possible origins of the spirit.

Despite their ancient origins, Amanojaku became closely associated with Buddhist imagery. They are sometimes depicted as the demons being crushed beneath the feet of the Four Heavenly Kings, symbolizing wickedness being defeated by righteousness. Demonic faces decorating the armor of Bishamonten are likewise identified with Amanojaku.

The best-known legend involving an Amanojaku is the story of Uriko-hime. An elderly childless couple discovered a baby girl inside a melon and raised her as their daughter, naming her Uriko-hime. She grew into a beautiful young woman, and eventually a marriage proposal arrived for her. Her parents went into town to prepare her dowry and warned her not to open the door to anyone while they were away.

Soon after they left, someone knocked at the door and called for Uriko-hime to let them in. She refused. The voice then asked her to open the window just a little. Uriko-hime reluctantly opened it a crack, whereupon a long, clawed finger entered through the opening and smashed the window apart.

An Amanojaku leaped inside and attacked her. Uriko-hime fought desperately, biting and kicking the demon, but she was unable to overpower it. The Amanojaku eventually snapped her neck and killed her.

The demon then flayed Uriko-hime’s skin from her body and wore it like clothing. Hiding beneath her clothes and using her skin as a disguise, it impersonated the girl so convincingly that her parents were deceived when they returned home.

When the wedding day arrived, the elderly couple brought the disguised Amanojaku to her future husband. A crow sitting in a nearby tree suddenly warned them that the bride was not what she appeared to be. The couple seized the supposed Uriko-hime and held her down. They washed her body until the flayed skin came away, revealing the Amanojaku underneath.

The demon fled, but the elderly couple pursued it. Villagers joined the chase until a large crowd was pursuing the Amanojaku through the village. Eventually they caught it and attacked it with sticks, stones, and tools, beating the demon until it was covered in blood and died.

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Sources

“Amanojaku.” Yokai.com: The Japanese Yokai Encyclopedia. Accessed September 12, 2026. https://yokai.com/amanojaku/

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Tradition: Japanese mythology
Alternative Names: Ryūtōki, Ryutoki, Dragon Lantern Demon
Category: Demon

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The Myth

Ryūtōki is a muscular, verdigris-colored demon with a large lantern resting on its head. A dragon is wrapped around its upper body, and Ryūtōki grips the dragon by its tail. It is approximately 80 centimeters tall.

Ryūtōki was created to illuminate the area before the Buddha. Unlike the usual depiction of demons in Buddhist art as beings trampled beneath guardian deities such as the Nio and the Four Heavenly Kings, Ryūtōki is portrayed as an independent demon entrusted with carrying a lantern before the Buddha.

Ryūtōki was one of two demon figures associated with the West Golden Hall of Kōfuku-ji, together with Tentoki. The two demons form a deliberate contrast: Tentoki is red, has its mouth wide open, and is associated with the A-form, while Ryūtōki is blue, keeps its mouth tightly closed, and is associated with the Un-form. Their different postures are regarded as a contrast between movement and stillness.

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Sources

Takahashi, Toshihiro. “龍燈鬼 [りゅうとうき] (Ryūtōki).” 新版TYZ 妖怪図鑑 (New TYZ Yokai Encyclopedia). October 21, 2025. https://tyz-yokai.blog.jp/archives/1085533967.html

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Tradition: Japanese mythology
Alternative Names: Tentoki, Tenki, Heavenly Lantern Demon
Category: Demon

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The Myth

Tentoki is depicted as a red demon with two horns and three crystal eyes. It has a stern but humorous expression, with its mouth opened wide, and wears an animal hide around its waist. It carries a large lantern upon its left shoulder.

Tentoki was one of two demon figures associated with the West Golden Hall of Kōfuku-ji Temple in Nara. The demons were unusual in Buddhist art because, rather than being portrayed as beings trampled beneath the feet of guardian deities, they were depicted as independent figures entrusted with carrying lanterns that illuminate the space before the Buddha.

Tentoki was paired with Ryūtōki, another demon who carried a lantern. Together, the two served as lantern-bearing companions before the Buddha. The figures were believed to have been created as votive offerings to the principal deity of the hall.

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Sources

Takahashi, Toshihiro. “天燈鬼 [てんとうき] (Tentōki).” 新版TYZ 妖怪図鑑 (New TYZ Yokai Encyclopedia). October 21, 2025. https://tyz-yokai.blog.jp/archives/1085533962.html

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