The Hyottoko is that comic, twist-mouthed face you meet at Japanese festivals. No demon, no scary yokai: a figure of fire and good fortune. You know him by his pursed, crooked mouth, as if blowing, often one eye smaller than the other, and the tenugui, the blue-dotted cotton cloth tied round his head. Nothing menacing, he's a good-humoured figure tied to the home.

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Where the name comes from
The name likely comes from hi-otoko (火男), "the fire man." In traditional houses, around the irori, the sunken hearth at the centre of the room, keeping the fire alive was vital, and you blew on the embers through a bamboo tube. Hyottoko's pursed mouth is that gesture frozen in place: a man blowing on the fire to keep it going.
The hearth legend
Several Tōhoku tales give him an origin. In one, a strange-faced child produces gold from his navel when gently pinched; the family prospers, until greed spoils everything. From this, Hyottoko stays tied to the home fire, the hearth and fortune. The variants change from region to region, but the core doesn't: this face brings luck to the house.
Hyottoko and Okame, the festival duo
Hyottoko rarely appears alone. His partner is Okame, also called Otafuku, a round female face with full cheeks and a calm smile. He's movement and comedy; she's calm and kindness. Together they form a balance, and you find them side by side at matsuri. Hyottoko appears above all in folk dances such as kagura: a dancer puts on the mask and plays the clown, with an exaggerated walk and clumsy gestures, to make the crowd laugh. At Hyūga, in Miyazaki prefecture, a big summer festival is devoted to him, with hundreds of dancers. Making people laugh is no small thing: joy draws luck and pleases the kami.
The contrast with demon masks
The Hyottoko stands apart from the intimidating Oni or the unsettling Hannya: he defuses. It's a face that lifts the mood, easy to place in an entryway, a kitchen or a friendly corner. Its difficulty, in the making, lies precisely in the mouth: too pronounced and it turns grotesque, too soft and it loses the blowing gesture. It all comes down to the right dose of asymmetry to make him look alive.
FAQ
Is Hyottoko a yokai?
No. He's a comic folklore figure, tied to fire and the home, not a frightening supernatural spirit. He belongs among the good-luck figures.
What's the difference between Hyottoko and Okame?
Hyottoko is the male face with the twisted mouth, tied to breath and fire. Okame, or Otafuku, is the round, smiling female face. The two form a duo at festivals.
Why is his mouth crooked?
Because he blows on the fire through a bamboo tube. His pursed mouth is that gesture frozen in place.
Where do you hang a Hyottoko mask?
In an entryway, a kitchen or a living space. It's a good-humoured face, at home where people gather, and said to bring luck to the household.