The Iso onna is a dangerous vampire like yokai from Kyushu and Western Japan they feed on fisherman and travelers.
They are closely related to
nure onna, despite having no serpent like features at all. Iso onna wander
rocky beaches, hunting for prey.
They are occasionally encountered far out at sea, but they
otherwise act the same as they do on land, capturing their human prey
and draining their victims’ blood using their long hair.
Iso onna are most commonly encountered during the holiday seasons
of Obon and New Years Eve, when the border between the realm of the
living and the realm of the dead can be more easily crossed.
They
occasionally cooperate with ushi oni to catch their prey the same as nure onna.
When she appears on the beach or shore, she looks like
beautiful young women, staring far out to sea.
When somebody approaches and
tries speak to her, she will turn around and let out an ear-piercing
shriek, which stuns their victim. Then attacks with her long
hair and drag her prey into the sea, where she drains her victim’s
blood with her hair.
On rocky coasts without sandy beaches, iso onna appear sitting on
the cliffs and calling out to passersby in an eerie voice. Their
victims are mesmerized into walking straight towards them, ignoring the
dangers posed by the rocky cliffs. They walk off the cliffs and fall to
their deaths, leaving the iso onna free to feed on their bodies.
Individual accounts of iso onna vary from one telling to the next when it comes to her appearance.
In most cases, they appear as beautiful women who have just
come out of the water, dripping wet. Their hair is long and matted,
reaching almost all the way down to the sand.
Their eyes are heavy with
sultry, sexual energy, and their wet clothes stick, nearly transparent,
to their skin. From the waist up, they appear like ordinary human women,
albeit soaking wet, while from the waist down, they are slightly blurry
and transparent, hinting at their spectral nature. In some regions, iso
onna are said to have snake like bodies similar to nure onna, while in other
regions they are said to be large enough to crush ships out at sea, like
umi-bÅzu.
They also have the ability to disguise themselves perfectly
as large beach rocks when they don’t want to be seen.