Oni

Origin and myth

Oni are the demons and ogres of Japanese folklore. The word appears in the Nihon Shoki, the court chronicle of 720 AD, where it names invisible malevolent spirits; over the following centuries, under the influence of Buddhist hell imagery from China, the oni took on a body and became the horned, fanged brute of popular tales. In Buddhist cosmology oni serve as the jailers and torturers of hell under King Enma. In folk belief they also lived in the mountains and on remote islands, raided villages, ate people and hoarded treasure.

The classic oni story is Momotaro, the peach boy, who sails to Onigashima, the island of demons, with a dog, a monkey and a pheasant and defeats the oni to recover stolen wealth. Another is the tale of Shuten-doji, the oni lord of Mount Oe, beheaded by the warrior Minamoto no Raiko after being tricked into drinking poisoned sake. Oni also appear in the setsubun festival, where families throw roasted soybeans at a masked "oni" while shouting "demons out, luck in".

Not all oni are evil. Some temple guardians have oni features, and a folk saying speaks of an oni's tears when even a demon is moved to pity. Over time the figure became partly comic and partly protective, appearing on roof tiles as a ward against misfortune.

Appearance

An oni is a huge, muscular humanoid, often two to three times human height in tales, with skin of red, blue, green or black. The head carries one or two horns, straight or slightly curved, growing from the forehead or temples. The face is broad with a wide mouth, prominent fangs, a flat nose and wild, bulging eyes; the hair is a thick unkempt mane, sometimes white.

They wear a loincloth of tiger skin and carry a kanabo, an iron club studded with spikes, sometimes as tall as the oni itself. Skin is heavy over bulging muscle, with veins and scars; hands and feet are clawed. The tiger stripes and the iron club are the two details that identify an oni instantly.

In modern fantasy

Oni are a fixture of fantasy games with Japanese or East Asian settings. They appear as monsters and sometimes as playable races in tabletop systems including Dungeons & Dragons and Pathfinder, as enemies and bosses in countless Japanese video games and animated series. Anime and manga have developed both fearsome and comedic oni.

3D printing notes

The oni is one of the most FDM-friendly creatures in any bestiary. A massive bipedal body with thick limbs, a broad stance and a club that can rest on the shoulder or the ground has almost no fragile parts. At 28-32 mm tabletop scale, resin gives the best face detail, but a 35 mm oni prints acceptably on FDM if the horns are thickened to 1.5 mm.

At 75 mm, print the body as one piece and the club and horns separately, keyed with pegs. Pose the figure with the club planted on the ground or held across both hands so it becomes part of the support structure. Hollow the body to 2.5 mm walls in resin; on FDM use 3 walls and 15 percent infill. At 150 mm and larger, split at the waist and shoulders and add a 4 mm brass rod through the legs into the base.

A print-in-place oni is highly practical: hinged shoulders, elbows, hips and knees with 0.5 mm FDM clearances give a poseable action figure, and the broad hands can be modelled with a socket for the club. Oni masks are a separate project: a 1:1 wearable mask prints well on FDM in two or three sections.

Painting and display

Red is the classic: a deep crimson base, a purple-black wash in the muscle creases, drybrushed with bright red and highlighted with orange on the cheekbones, knuckles and shoulders. A blue oni uses an ultramarine base with a black wash and pale blue highlights. The tiger loincloth is a yellow-orange base with black stripes and a brown wash; the club is gunmetal with rust washes and steel drybrushing on the spikes. Horns and fangs in bone tones; eyes bright yellow.

The base can be a mountain cave floor with scattered bones and stolen treasure, or a temple gate with a stone lantern. For lighting, a red LED under a translucent resin brazier or a pile of glowing coals reads as a hell gate.

Related creatures

The oni's closest western counterparts are the Ogre and the Norse Troll; the one-eyed Cyclops is another giant brute. Within Japanese folklore the oni's cunning opposite is the fox spirit Kitsune.

If you would like an oni figure or a wearable oni mask, ask Fantasy Lab 3D for a custom print.