The scary image with goggly eyes and a pained expression was based on a Japanese ghost called "ubume", explained Keisuke Aiso, head of Tokyo-based firm LINK FACTORY, which makes props for TV dramas.
The silicon-based sculpture, which stands about one metre high, was first shown at a ghost-themed exhibition in Tokyo's swanky Ginza district in 2016 but attracted little attention at the time.
It was one of many ghost-themed sculptures in Aiso's repertoire and the artist said: "It was meant to scare people, yes, but it wasn't meant to harm anyone."
Blue Whale and Momo challenge banned in Pakistan
Aiso, 43, destroyed the sculpture last year because it began to deteriorate. "That was nothing to do with the recent case," he stressed.
The terrifying image has been at the centre of a viral hoax, as reports surfaced that children were being induced by "momo" into dangerous tasks and even self-harm and suicide.
However, there is no evidence this is true and the myth seems to have been propagated mainly by concerned parents via social media.
Aiso appeared bemused by the reports and said: "I'd be happy if such a challenge never existed."
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