Amorōnagu A female tennyo from the island of Amami Ōshima in Kagoshima Prefecture, who is said to bathe in pools and waterfalls in ravines. Amikiri A bird-headed, crustacean-armed, snake-bodied spirit that cuts fishing nets and mosquito netting. Amemasu An Ainu creature resembling a giant fish or whale, it sometimes takes the form of a beautiful woman to lure sailors to their deaths. Amefurikozō A little boy spirit who plays in the rain. Amazake-babaa An old woman spirit who comes late at night and who asks for sweet sake in a child's voice, bringing disease to whoever answers, whether they give her any or not. Amanozako A monstrous goddess mentioned in the Kujiki, born from Susanoo's ferocious spirit when he vomited it forth. Amanojaku A small demon that instigates people into wickedness. Amamehagi A ritual-disciplinary demon from Hokuriku. Amaburakosagi A ritual-disciplinary demon from Shikoku. Amabie A Japanese mermaid yōkai that emerged from the sea to give a prophecy. Akurojin-no-hi A ghostly fire from Mie Prefecture that appears on rainy nights and gravely sickens those who do not flee from it.

Akugyo An enormous species of sea monster found in the waters around Japan. Akubōzu A spirit that lives in the ashes of hearths from Akita Prefecture and Iwate Prefecture. Akkorokamui A giant Ainu monster resembling an octopus, which supposedly lurks in Uchiura Bay in Hokkaido. Akateko A red child's hand dangling from a tree, accompanied by a hypnotically beautiful woman standing beneath the tree to lure people into its grasp. Akashita A hairy creature with a large tongue that looms in a black cloud over a floodgate. Akaname A spirit that licks off filth in untidy bathrooms. Akamanto A ghost in a red mantle that offers either red or blue toilet paper rolls in bathrooms, then kills whoever answers based on their choice: flaying for red, strangulation for blue. Akabeko A red cow involved in the construction of the Enzō-ji temple in Yanaizu, Fukushima. She mainly targets young women who have just come of age.

'ash crone') A blind, cannibalistic female yōkai who hails from Akita Prefecture. Abura-sumashi A large-headed spirit that lives on a mountain pass in Kumamoto Prefecture. Abura-akago An infant ghost that licks the oil out of andon lamps. A Abumi-guchi A small furry creature formed from the stirrup of a mounted military commander who worked for Yamata no Orochi.

Fire demon mythology