TRANSLATION: riverbank priest boy
HABITAT: rivers and riverbanks
APPEARANCE: Gangikozō are hairy, monkey-like water spirits which inhabit rivers. They live along the riverbanks, where they hunt fish. Their bodies are covered in hair, and the hair on their head resembles the the bobbed okappa hair style once popular among children in Japan. Their most notable features are their webbed hands and toes, and their long teeth which are sharp and jagged like files. They are close relatives of the much more well-known kappa.
BEHAVIOR: Gangikozō are not encountered outside of the riverbanks, and there may be a good reason for this; according to one theory, they are a transitional form of kappa. According to many legends, kappa transform from river spirits into hairy mountain spirits when the seasons change. The specific details differ quite a bit from place to place. However, in Yamaguchi prefecture, there is a hairy mountain spirit called a takiwaro which transforms into a water spirit called an enko (a variety of kappa). Some folklorists believe that the gangikozō is a kind of takiwaro, and thus is merely a transitional form of a kappa. This would explain why so little is known of them.
INTERACTIONS: Gangikozō normally stay away from people, but occasionally encounter fishermen along the rivers they inhabit. When meeting a gangikozō, fishermen often leave their largest, cheapest fish on the riverside as an offering.
ORIGIN: Gangikozō do not appear in any local legends, though stories of very similar-looking yokai do. The first and only written record of them is in Toriyama Sekien’s yokai encyclopedias. It is therefore possible that gangikozō was made up by Toriyama Sekien based on the numerous legends of transforming kappa.
According to Mizuki Shigeru, the name gangikozō can be written with another set of kanji, 雁木小僧. These characters can mean “stepped pier” or “gear tooth” depending on the context. This writing reflects both the habitat of the gangikozō as well as its mouth full of sharp teeth, which resembles a toothed gear.
TRANSLATION: little tofu boy
HABITAT: urban areas
DIET: omnivorous; loves tofu
APPEARANCE: Tōfu kozō are small yokai who closely resemble human children except for their large heads and clawed fingers and toes. They wear little boys’ kimonos and wide-brimmed hats — the typical outfit of a tōfu-selling young boy of the Edo period. They are usually depicted with two eyes, but in some illustrations they appear as having only one eye. They are usually found in urban areas in close proximity to people.
BEHAVIOR: Tōfu kozō are timid and weak yokai, and are not known to be aggressive towards humans. On rare occasions, a tōfu kozō may follow a human home on a rainy night, but for the most part they shy away from any confrontation.
INTERACTIONS: Tōfu kozō are first and foremost servant yokai. Even among other yokai, they are often bullied and teased for their lack of strength. They get no respect from those above them; at most, they act as menial servants to more powerful yokai.
ORIGIN: Prior to the Edo period there are no known stories about tōfu kozō, and so their origin is a mystery. Some say that they are just one of many forms taken by an itachi, a shape-shifting weasel yokai. Others say that they are the offspring of a mikoshi-nyūdō and a rokuro-kubi. Another possibility is that they are an invention of a creative artist looking to sell illustrated storybooks. Stories of tōfu kozō first appeared in the penny-novels and pulp fiction of Edo in the 1770’s, and became incredibly popular among the Edo upper class. These silly stories helped to spawn the explosion of yokai-related fiction that appeared in the later half of the 18th century.
Tōfu kozō bears a very strong resemblance to another yokai called hitotsume kozō — the chief difference being that hitotsume kozō has only one eye and a very large tongue, while tōfu kozō has two eyes and carries a plate of tofu. Both of these yokai are somewhat weak, child-like creatures who act as messengers to more powerful monsters. In some literature the two yokai are used interchangeably for each other, therefore it has been suggested that tōfu kozō may be closely related to, or may even have been copied from hitotsume kozō. However, there is not enough evidence either way to say where this yokai comes from.