Why Does the Ittan-momen Fly at Dusk? Twilight and the White Cloth That Sends Children Home

The most interesting thing about the ittan-momen is that we know exactly when it comes out. Not at midnight, and not in broad daylight, but at dusk, when the sun has set and the sky is still faintly bright. This white-cloth yokai from the Osumi region of Kagoshima Prefecture is said to come fluttering by in that in-between hour, right on the border of day and night.

The blurry hour between day and night

Dusk is the time of day when our eyes are most easily fooled. There's still light in the sky, but the ground goes dark first, and the shapes of distant things start to soften and blur.

In that half-light, the last things to stay visible are the white ones: a cloth someone forgot to bring in, a white bird by the river, a rising wisp of smoke. Each of them seems to float against the darkening scenery. It's probably no coincidence that the ittan-momen is a white cloth and that it appears at dusk. At the hour when things are hardest to see, the brightest-colored thing drifts by on the wind. Perhaps that's where people long ago sensed that something was there.

"Tasogare" and "Omagatoki"

Japanese has several words for the evening twilight. "Tasogare" is said to come from "ta so kare": "who is that over there?" It's the hour when it gets too dark to make out a face, and that feeling became the word itself.

There's another word, too: "omagatoki," the hour of meeting demons. Twilight was thought of as the time when things that aren't human begin to stir. The daytime world is ending, the nighttime world is beginning, and in the gap between them comes the ittan-momen. It is a yokai of exactly this hour.

"Hurry home"

In the Osumi region, a story remains that children still playing after sundown were told, "The ittan-momen will come." The ittan-momen is said to swoop in and wrap around your neck or cover your face. If you believed something like that might come down from the sky, you'd run straight home.

For children long ago, field paths and riverbanks after dark really were dangerous places. You couldn't see your feet, and if you lost your way, you might not find the road home. Yokai stories weren't told only to frighten. They were also passed down as a kind of wisdom for keeping children safe. Many other parts of Japan have their own yokai tales that hurry children home at nightfall.

In the old tales, it has no face

Today, many people picture the ittan-momen as it appears in manga and anime. But in the local lore, the ittan-momen has no eyes and no mouth. It's simply a long strip of white cloth. Not a yokai with someone's face, but the cloth itself, dancing across the evening sky, was the frightening part. That was the original ittan-momen.

On the ittan-momen's Yokaipedia page, Pixel Yokai draws it with no face at all, as a cloth winding through the sunset sky. Another yokai whose form the old tales leave unclear is the nurikabe, the invisible wall that blocks the road at night.

Some evening, if you see a white shirt someone forgot to bring in, swaying in the wind, it's almost certainly just a shirt. But spare a moment to think of the white cloth flying through the dusk sky over Osumi.