Sunekosuri: The Thing That Brushes Your Shins on Rainy Nights

The sunekosuri is a strange yokai. It doesn't eat people, and it doesn't lead them astray. On rainy nights it presses up against the feet of someone walking by and slips through between their shins, rubbing against them as it goes. That's nearly the whole story. And yet it got a proper name and has been told of as a yokai of Okayama Prefecture. Why wasn't a yokai that does almost nothing simply forgotten? The answer may lie in how it felt, underfoot, to walk a dark road long ago.

A feeling before a face

Most yokai are described first by how they look: horns, a single eye, a stretching neck. With the sunekosuri, though, what matters most isn't its looks. It's the feeling of something touching your legs.

You can see this in the name itself. "Sune" means shin, and "kosuri" means rubbing. The name doesn't tell you what it is; it tells you what it did to you. It's said to look like a dog, and that may overlap with a simple thought: what else rubs against your legs like that?

Many yokai are named this way, after what happened to someone or what they felt. If sand falls on you in the shade of a shrine forest, that's the sunakake-baba, the "sand-throwing old woman." When no one knows what something really is, perhaps the only thing left to name is the feeling itself.

The stage: a rainy night

The sunekosuri is said to appear on rainy nights, and that's a well-chosen stage.

On a rainy night there's no moonlight, and you can barely see your own feet. Holding an umbrella, you're even less likely to look down. The wet hem of your kimono sticks to your legs as you step around puddles, testing each step. Then something soft brushes lightly past your calf. Because you can't see it, even the smallest touch might send a shiver all the way up your back.

Was it the wind, a wet blade of grass, or was something really there? Perhaps people long ago caught that uncertainty and gave it a name: sunekosuri.

Lined up with other yokai of the night road

Japan has other yokai that trouble people on dark roads. Put them side by side, and the sunekosuri's character comes into focus.

• Nurikabe: from Fukuoka, an invisible wall that suddenly stops you from going forward on a night road
• Betobeto-san: from Nara Prefecture, a yokai that is only footsteps following you at night. Step to the side of the road and say "after you," and the footsteps are said to stop
• Okuri-inu: a dog yokai that follows people along mountain paths. It's said to pounce if you fall, and its tales are told in many regions

One blocks the way ahead, one follows from behind, and one twines around your feet. None of them shows itself clearly; they all speak to the walker's body instead. A dark road was a place where imagination grew on its own. And among these, the sunekosuri looks like the smallest and friendliest of all.

Why a harmless yokai stayed with us

Meeting a sunekosuri makes walking a little awkward, and that's about it. Maybe that's exactly why it was such a good one to tell. "Something touched my leg on the way home in the rain." "Oh, that was a sunekosuri." Just having a name turns an unknown feeling into a story you can almost laugh about.

On the sunekosuri's Yokaipedia page, our pixel art shows it slipping between a walker's legs. If your ankles ever feel ticklish on a rainy night, imagine a sunekosuri passing by, and just keep walking, slowly.