According to Japanese beliefs, hajikkaki are pathetic looking yōkai with plump, white, hairless blobby bodies. They have round eyes and protruding fangs. They frequently cover their heads with their hands in a display of shame or embarrassment.

Hajikkaki appear in a number of old yōkai scrolls, such as the Bakemono tsukushi emaki. Like most of the yōkai found in scrolls, all that is recorded is a name and an illustration. Everything else about them is entirely speculation, added on later by storytellers and folklorists.

Although nothing is written about hajikkaki, its illustrations are based on a Chinese spirit called the shahyōchū (謝豹虫). In Chinese folklore, shahyōchū are frog-like bugs which are born from the souls of people who died while feeling embarrassed. They are so shy that they spend their entire lives buried under the ground. If you should dig one up, it will bestow a curse of shame on you, and something terribly shameful or embarrassing will happen to you. Because hajikkaki’s name evokes the same feelings of shame, it’s possible that it was meant to be an artistic interpretation or reinvention of shahyōchū.