Sunekosuri are small, mischievous spirits from Okayama Prefecture. They appear on rainy nights in streets and alleys where people travel. They are most often described as dog-like in appearance, though they are also occasionally said to resemble cats.

Sunekosuri run up behind people walking on dark, rainy nights. They rub against their shins, weave in and out of their legs, nuzzle against the knees, and otherwise make it difficult to walk. They do not intentionally cause any harm to humans, although occasionally their rubbing is strong enough to make a person stumble or even knock them down.

A few local of the local variations are slightly more aggressive than the sunekosuri. The sunekkorogashi and sunekkorobashi both mean "shin toppler". The sunekajiri means "shin biter". Although not as violent as other kinds of yōkai, these spirits are blamed for the occasional bruise or bloody nose.

Sunekosuri is a relatively modern yōkai. It did not appear in writing until the 1935 yōkai encyclopedia Genkō Zenkoku Yōkai Jiten, although it is impossible to tell how far back oral traditions go. Despite its relative recentness, it is a fairly well-known and well-loved yōkai, most likely due to its cute depictions and manga and film.