Momo refers to a sculpture of a young woman with long black hair, enormous bulging eyes, a wide toothless grin, and the legs of a bird. The piece was created by Keisuke Aiso of Link Factory, a Japanese special effects company, and displayed at the Vanilla Gallery in Tokyo's Ginza district in 20165. The sculpture was inspired by the Japanese folklore figure of the *ubume*, the ghost of a woman who dies in childbirth1.

After photos of the sculpture circulated online, the image was co-opted into an alleged WhatsApp-based "challenge game" in 2018, where anonymous accounts supposedly messaged children with dangerous instructions. The resulting panic, fueled by breathless news coverage and school warnings, turned out to be far more viral than any actual challenge. Momo became one of the internet's most prominent examples of a moral panic outpacing reality4.

The sculpture that became Momo was built in 2016 by Keisuke Aiso (also written as Aisawa), a 43-year-old special effects artist working at Link Factory, a Japanese company that creates props for horror films and TV shows5. Aiso designed the piece, officially titled "Mother Bird," based on the legend of the *ubume*, a wraith-like bird woman from Japanese folklore said to haunt the area where she died in childbirth1. The sculpture showed a woman's head and naked torso with exaggerated features perched atop a pair of bird legs, standing about one meter tall12.

On August 25, 2016, Instagram user nanaakooo posted the first known photograph of the sculpture8. The following day, Instagram users @ma_kimodo_shi and @j_s_rock posted additional photos8. The images initially circulated without much fanfare, but they caught the attention of Spanish-speaking internet communities, where the sculpture became associated with a phone number that could be added to WhatsApp8.

The Momo panic triggered responses from governments, schools, and tech companies across multiple continents. Mexican state authorities issued formal warnings about data theft8. UK schools posted alerts on Facebook and the British government offered guidance to parents2. YouTube changed its monetization policies to strip ads from all Momo-related content1. WhatsApp reminded users they could block any phone number and report problematic messages2.

Child safety organizations like the NSPCC weighed in, and the story received coverage from Rolling Stone, Snopes, CBS News, the Daily Mail, and dozens of other outlets14. The episode became a case study in media amplification, with researchers noting that the warnings themselves caused more exposure to the disturbing image than the alleged challenge ever did9.

The sculpture also caught Hollywood's attention. Orion Pictures, partnering with the producers behind The Ring and It franchises, announced development of a Momo-inspired horror film in July 20197. The project aimed to explore the Japanese *ubume* folklore underlying the sculpture rather than simply recreating the internet hoax7.

The story of Momo is, at its core, a story about how fear travels faster than facts on the internet.

When Keisuke Aiso created "Mother Bird" for the Vanilla Gallery exhibit in 2016, the piece received almost no attention. "When it was exhibited at the gallery it did not receive much attention, so at the time I was very disappointed," he later told The Sun5. The sculpture sat in relative obscurity for nearly two years while its photos drifted through Instagram and Spanish-language internet forums, slowly accumulating an eerie reputation12.

The WhatsApp legend that crystallized around the image in mid-2018 followed a familiar template. Users were told to contact "Momo" via an unknown number. After making contact, an anonymous person allegedly ordered increasingly dangerous acts and sent violent images if the target refused2. Claims circulated that threats included being "killed in their sleep" or having family members harmed2. The format closely mirrored the Blue Whale Challenge, a Russia-based hoax from 2016-2017 that had similarly terrified parents worldwide1.

The 2018 wave produced real-world consequences. In Argentina, police investigated the suicide of a 12-year-old girl as potentially connected to the game, with investigators examining her phone for WhatsApp evidence6. Deaths of two young men in India and two teenagers in Barbosa, Colombia were also reported as possibly linked, though no definitive connections were documented in any case4. As Snopes noted, authorities in Argentina only confirmed the girl "was encouraged by her participation in a viral 'game' rather than a real-life person," leaving the actual mechanism unclear4.

The February 2019 explosion dwarfed the original wave. Schools across the UK issued urgent warnings to parents. One school's Facebook post read: "These video clips are appearing on many social media sites and YouTube (including Kids YouTube). One of the videos starts innocently, like the start of a Peppa Pig episode for example, but quickly turn into an altered version with violence and offensive language"2. The warnings spread faster than anyone could verify them. SuperAwesome, a company running a safe social platform for children under 13, observed that "parents, schools and concerned groups made Momo go viral by creating panic and messaging images and warnings to each other"9. Their content filters blocked Momo discussions on their PopJam platform, but kids reported talking about "that scary thing" at school9.

Cybersecurity experts, child safety organizations, and fact-checkers pushed back hard. YouTuber ReignBot, whose original investigation video had over 2 million views by this point, noted that "finding screenshots of interactions with Momo is nearly impossible and you'd think there'd be more for such a supposedly widespread thing"4. Technology reporter Larry Magid called the game "likely a hoax"4. YouTube eventually announced it would demonetize all Momo content, even from legitimate news organizations reporting on the story1.

The sculptor himself weighed in. Aiso told The Sun he had already thrown away the rotting sculpture in autumn 2018, weeks before the second panic hit5. "It doesn't exist anymore, it was never meant to last," he said. "The children can be reassured Momo is dead, she doesn't exist and the curse is gone"5. He expressed mixed feelings about the entire affair: "On one hand they have caused me nothing but trouble, but on the other hand as an artist I have a little sense of appreciation that my art piece has been seen across the world"5. The model had been made from rubber and natural oils and had simply decomposed. All that was left was a single eye he planned to recycle for future work5.

Amid the panic, the internet did what it does best: turned fear into humor. By late February 2019, Momo memes flooded Twitter and Instagram3. People Photoshopped makeovers onto the image, gave Momo fashionable outfits ("my son momo got the drip"), and recast the character as empowering rather than threatening3. One popular tweet joked that "people are only calling the momo challenge a hoax because they love to see powerful women fail"3. Another declared Momo "the Babadook's sister-in-law"3.

Hollywood took notice too. In July 2019, Orion Pictures partnered with producer Roy Lee (The Ring, It) and Taka Ichise to develop a horror film inspired by the Momo legend, potentially drawing on the *ubume* folklore rather than just the internet hoax7. A separate film called *Getaway*, also inspired by the Momo story, was already in production7.

The irony of Momo was noted by virtually every serious analysis of the episode. The media warnings designed to protect children actually amplified the image and legend far beyond anything the original hoaxers achieved9. Kids who had never encountered "Momo" searched for the image out of curiosity, found creepy edits and reaction videos, and the cycle fed itself11. As one commentator put it, Momo was less an internet threat and more a mirror reflecting how quickly fear spreads in a connected world11.