Tōfu-kozō, also called Tofu Boy, manifests as a child-like yōkai clutching a tofu tray marked with a maple leaf. Clad in a bamboo hat and kimono embroidered with daruma dolls, red rockfish, horned owls, and taiko drums—symbols once thought to repel smallpox—he sports a large head, clawed fingers, and occasionally a single eye in early renditions, later standardized to two.

Emerging as an Edo-period urban invention devoid of ancient folklore roots, the character debuted in the 1777 illustrated volume *Bakemono Shiuchi Hyoban-ki*, flourishing through kibyōshi stories, toys, and kabuki. Scholars speculate origins tied to tofu vendors’ promotions, shape-shifting weasels (itachi), or hybrid lineage from yōkai Mikoshi Nyūdō and Rokurokubi.

Timid and submissive, Tōfu-kozō typically acts as a messenger or laborer for stronger yōkai. Post-Shōwa-era tales introduce a sinister twist: his mold-ridden tofu induces lethal internal growths, a menace crafted for children’s stories. Modern reinterpretations cast him as an anti-bullying emblem, reflecting his bullied status among supernatural peers.

In manga and anime like *GeGeGe no Kitarō*, he aids deities such as Yamagami, supports pop idols, and battles threats ranging from deforestation to supernatural invasions. His agility allows bullet-catching with his tongue and swift vanishing acts, yet damaging his tofu tray paralyzes him. A 2018 plotline depicts his mold-infused tofu sparking a pandemic, requiring supernatural countermeasures.

Debates persist over his ties to Hitotsume-kozō (One-Eyed Boy), with overlapping features suggesting shared origins, though later works treat them as separate entities. Culturally, Tōfu-kozō evolved from comedic Edo-era servants to figures blending humor and horror, immortalized in statues along Sakaiminato’s Mizuki Shigeru Road. His legacy intertwines with tofu’s Edo-era culinary rise, anchoring him in Japan’s urban lore.