Oni
Supernatural power, punishment of the wicked, raw force. Oni are agents of divine punishment who torment sinners in hell, but can also be protectors.
Oni appear throughout Japanese folklore as fearsome ogre-like demons — red, blue, or green-skinned with horns, fangs, and tiger-skin loincloths, wielding iron clubs (kanabō). The Setsubun festival involves throwing beans to drive oni away. Shuten-doji, the most famous oni, was slain by Yorimitsu.
Oni render as muscle-bound horned demons in tiger-skin loincloths, skin in saturated red, blue or green — the colour is a genuine choice, as each carries folk associations. Kanabō war clubs, wild hair and fanged grimace complete the figure. Colour treatments push skin saturation against black hair masses; black-and-grey oni rely on musculature shading and the horns' polish. The face can run from terrifying to almost comic — Japanese tradition tolerates humour in its demons, and the best oni have personality.
Oni carry guardian symbolism despite their menace — placed on shoulders, upper arms and backs they ward rather than threaten. An oni mask alone is a compact alternative anywhere a hannya would fit. Full-figure oni want dynamic poses: crouched on a shoulder blade, striding across a thigh, or bursting through storm cloud on a back panel. Pair with lightning, black cloud and wind. The oni-versus-Shoki chase composition wraps beautifully around a calf or forearm for wearers who like narrative.
Convention avoids composing Oni Demon alongside Kannon (Kannon Bosatsu) and Kirin (Kirin) — seasonal or symbolic clashes an experienced irezumi artist will flag at consultation.
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