Summer (夏): Seasonal Spirits

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Summer yokai thrive in heat and light—fire spirits, ocean creatures, and festival demons.

Akkorokamui
Yokai

Akkorokamui (アッコロカムイ)

A colossal sea monster from Ainu lore, feared and revered as a divine octopus-like guardian of the ocean.

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1058

Akurojin-no-hi
Yokai

Akurojin-no-hi (悪路神の火)

A ghostly fire from Mie Prefecture that haunts desolate mountain paths and brings misfortune to travelers.

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623

Amemasu
Yokai

Amemasu (アメマス)

A powerful fish- or whale-like beast from Ainu folklore, said to cause earthquakes and drag boats beneath lakes.

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606

Aoandon
Yokai

Aoandon (青行燈)

The eerie spirit of the blue lantern, said to appear at the end of a hundred ghost stories told by candlelight.

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573

Aosaginohi
Yokai

Aosaginohi (青鷺の火)

A ghostly blue heron said to shimmer with supernatural fire as it moves through swamps and riverbanks.

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504

Ashinagatenaga
Yokai

Ashinagatenaga (足長手長)

A legendary yokai pair—one with long legs, the other with long arms—who fish cooperatively in deep coastal waters.

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614

Asobibi
Yokai

Asobibi (遊火)

A mysterious flickering flame from Kōchi Prefecture said to drift playfully through the night fields.

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496

Ayakashi
Yokai

Ayakashi (綾かし)

A sea spirit often synonymous with the ikuchi — a massive eel-like yokai that coats ships in oily residue.

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587

Ayakashi-no-ayashibi
Yokai

Ayakashi-no-ayashibi (綾かしの怪火)

A ghostly flame seen in Ishikawa Prefecture, often considered a spiritual warning or wandering soul.

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448

Bake-kujira
Yokai

Bake-kujira (化鯨)

A ghostly whale yokai said to appear off the coast of western Japan. Surrounded by strange birds and fish, it brings mis...

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555

Chōchinobake
Yokai

Chōchinobake (提灯お化け)

A haunted paper lantern yokai with a single eye and long tongue, brought to life through age or neglect, often startling...

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557

Enkō
Kappa

Enkō (猿猴)

A regional variety of the kappa found in Shikoku and western Honshū, known for its monkey-like features and mischievous...

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942

Funayūrei
Spirit

Funayūrei (船幽霊)

Ghostly spirits of those who perished at sea. They appear on stormy nights, trying to sink ships and drag sailors to wat...

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732

Garappa
Kappa

Garappa (がらっぱ)

Garappa is a river-dwelling yokai native to Kyūshū. A regional variation of the more well-known kappa, it is mischievous...

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475

Hiderigami
Yokai

Hiderigami (日照り神)

A fearsome god or spirit responsible for droughts. It is said to dry up the land wherever it appears, withering crops an...

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635

Hitodama
Yokai

Hitodama (人魂)

A mysterious glowing orb believed to be the soul of a recently deceased person, floating through the night air.

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802

Hyakki Yakō
Yokai

Hyakki Yakō (百鬼夜行)

A legendary night procession of a hundred demons and spirits. Anyone witnessing it without protection would meet a dread...

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699

Hyōsube
Kappa

Hyōsube (兵主部)

A hairy kappa-like creature known for sneaking into baths and leaving hair everywhere. While mischievous, it can become...

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554

Ikazuchi-no-Kami
God

Ikazuchi-no-Kami (雷の神)

A powerful thunder god from Japanese mythology, associated with storms, lightning, and divine wrath.

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519

Ikuchi
Yokai

Ikuchi (イクチ)

A mysterious sea serpent from Japanese legend that travels over boats at sea, trailing oily slime and causing panic amon...

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513

Isonade
Yokai

Isonade (磯撫)

A fish-like sea monster with a barb-covered tail, said to lurk off the coasts of western Japan and attack ships with ste...

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573

Kahaku
Yokai

Kahaku (河伯)

Another name for the kappa—a mischievous and dangerous water-dwelling yokai, revered and feared in Japanese folklore.

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539

Kappa
Yokai

Kappa (河童)

One of the most iconic Japanese yokai, the Kappa is a mischievous water spirit known for its bowl-shaped head, sumo skil...

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850

Kawa-akago
Yokai

Kawa-akago (川赤子)

Kawa-akago is a river-dwelling yokai that takes the form of a crying baby. It lures passersby close to the water, often...

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477

Kawa-uso
Yokai

Kawa-uso (川獺)

Kawa-uso is a mischievous river otter yokai known for its shapeshifting powers and playful tricks on humans. It often im...

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510

Kawa-zaru
Yokai

Kawa-zaru (川猿)

Kawa-zaru is a foul-smelling, cowardly river creature from Japanese folklore. Unlike its cousin the kappa, it avoids con...

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523

Ningyo
Yokai

Ningyo (人魚)

A fish person or mermaid in Japanese folklore, said to grant longevity if eaten, but also brings misfortune.

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665

Onibi
Yokai

Onibi (鬼火)

Mysterious floating flames believed to be ghost fires or spiritual energy, often seen near graves or haunted places in t...

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715

Raijin
God

Raijin (雷神)

The god of thunder and lightning, often depicted with drums used to summon storms.

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465

Raijū
Yokai

Raijū (雷獣)

A beast made of lightning that falls from the sky during storms and sometimes curls up in sleeping people's bellies.

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1484

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