Ibaraki-dōji

Accounts vary by locality. In Settsu-origin versions Ibaraki-dōji is said to have been born after an unusually difficult eighteen-month labor, arriving with teeth and immediate mobility; the infant laughed with sharp eyes and caused the mother to die of shock. In an Echigo-origin tale the child served as a page at a shrine (Yahiko-jinja / Kokojō-ji) and transformed into an oni after licking blood from a love-letter smear. Across versions the name element 'Ibaraki' ties the creature to particular place-names (Ibaraki city / Ibaraki in Settsu or places in Echigo), while 'dōji' marks it as a demon-child figure; some locales later treat the figure as part of shrine lore or even enshrine a local memorial.

Narratives describe Ibaraki-dōji as born with teeth (fangs), of great size (giant), and fearsome aspect; one account mentions long hair and a fierce gleam in the eye. Artistic representations (e.g., an 1840 preparatory sketch by Shibata Zeshin) depict the being capable of adopting a human guise and then reverting to a dramatic demonic form—most famously shown transforming while reclaiming a severed arm. Gender in the tradition is inconsistent: some tales portray Ibaraki-dōji as male, others as a kijo (female oni), reflecting variation across sources.

Ibaraki-dōji is depicted as physically powerful and violent: a core subordinate in Shuten-dōji’s band that raids the capital, kidnapping women and wreaking havoc in the Heian capital according to the Shuten-dōji cycle. A Settsu barber-shop variant narrates a taste for human blood (an origin episode where the child injures customers and licks their blood, later deliberately wounding to drink blood). The figure can disguise itself in human form—used to reclaim a severed arm by posing as a relative to approach Watanabe no Tsuna—and then transform back to demonic aspect. In the tale cycles it withstands and resists human warriors long enough to require extraordinary martial action to be temporarily neutralized.