Yume no seirei, from Japan: what it is and what people believe

Yume no seirei is a Japanese yōkai known for causing nightmares. It appears in illustrated demon volumes from the Edo period as an emaciated figure that beckons sleepers.

Share on WhatsApp

Yume no seirei means dream spirit in Japanese
It appears in Sawaki Suushi's 1737 Hyakkai Zukan
Depicted as an emaciated old man in a white robe
Holds a cane and beckons with its left hand
Lower body fades away like mist

What it is

Yume no seirei translates to dream spirit. It is a type of yōkai, or supernatural creature, in Japanese mythology. This entity is specifically associated with disturbing the sleep of the living. People believe it causes nightmares rather than offering protection or guidance. The spirit is part of a broader cultural understanding of ghosts and demons that were thought to roam freely during certain historical periods.

Where it comes from

Belief in such spirits was strong during the Heian and Edo periods. During these times, people feared that spirits of the dead could cause various evils. These entities were sometimes seen in the Hyakki yakō, a night procession of one hundred demons. The yume no seirei appears in the Hyakkai Zukan, an illustrated volume created by Sawaki Suushi in 1737. It is also recorded in the Bakemonozukushie, a collection housed at Brigham Young University.

Tools and materials

Artists depict the spirit wearing a loose white robe that reveals a frail body and exposed ribcage. It has thin wispy hair that flows behind it. In its right hand, it holds a cane. Its left hand reaches out to beckon. The bottom half of its body fades away, making it appear as if it is disappearing into mist.

Yume no seirei, drawn and placed

Emblem white, with the feather shape. Drawn from this page, not a photograph.

Living
Revived
Fading
Historical
Legendary
Performed

Standing: Historical Documented in the past; no continuous living tradition today. This says whether people still do it, not whether it works.

A feather: used in cleansing and blessing in some traditions, worn as a sign of office, and carried as a charm.

Lineage: Japanese yōkai tradition
Timing: during sleep

Where it sits The tradition it belongs to, and when it is done.

What it is for

The primary purpose of this being is to induce fear through nightmares. It targets individuals while they are sleeping. The act of beckoning suggests an invitation into a nightmare state. Unlike benevolent spirits, it does not offer help. It exploits the vulnerability of the sleeper to cause distress.

Peoples and places

This figure belongs to Japanese folklore. It is documented in Edo period art and manuscripts. The description shares similarities with female yūrei ghosts, which also appeared as pale figures with long hair and fading lower bodies. However, yume no seirei is depicted as an elderly man. Some sources use similar imagery for binbōgami, the kami of poverty, who is also a skinny old man but brings financial ruin rather than bad dreams.

At a glance: who, where and when

Peoples

Japanese

Belief worlds

Indigenous and shamanic

What people believe

Sleep was viewed as a vulnerable state where the spirit and body might separate. Pillows were considered thresholds between worlds. Moving a pillow was feared because it might prevent the spirit from returning. Yume no seirei takes advantage of this separation. It is part of a worldview where demons and ghosts move from dusk to dawn. The spirit represents the danger inherent in the unconscious mind.

Compare and confuse

It is often compared to baku, the dream-eater. Baku is a benevolent spirit that eats nightmares, acting as the opposite of yume no seirei. It is also visually similar to makura-gaeshi, the pillow shifter. Makura-gaeshi moves pillows during sleep, which was believed to trap the soul. While makura-gaeshi plays pranks, yume no seirei directly causes psychological harm through nightmares.

Questions people ask about Yume no seirei

What is yume no seirei?

It is a Japanese yōkai known as a dream spirit. It is believed to cause nightmares for people who are sleeping. The name comes from the Japanese words for dream and spirit.

Where does it come from?

It originates from Japanese folklore, particularly during the Heian and Edo periods. It appears in illustrated demon books like the Hyakkai Zukan from 1737.

What does it look like?

Artists show it as a thin, elderly man in a loose white robe. He holds a cane and reaches out to beckon. His legs fade away into nothingness.

Is it related to other spirits?

Yes. It is the opposite of baku, which eats nightmares. It also looks similar to binbōgami, the spirit of poverty, and shares traits with yūrei ghosts.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Yume no seirei", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryJaadu rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. Names and customs differ from one community to the next, and some knowledge is closed to outsiders and left out here. This page describes belief and practice. It does not say that any of it works, it is not a how-to, and it is not medical advice. If something is wrong, tell us. Last refreshed 2026-10-16.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.