In Japanese folklore, the kappa is a familiar type of water monster, considered one of three major yōkai.
A kappa in ukiyo-e art.—Kyōka Hyaku Monogatari (1853).
Kappa (かはつは) from Bakemono no e (c. 1700), Harry F. Bruning Collection of Japanese Books and Manuscripts, L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University.
Two scaly-skinned kappa violate an ama diver underwater as her companion looks on from above.—Unsigned shunga erotic art "Abalone divers (awabi-tori)" (1788) of the Utamakura series, attrib. to Utamaro, pub. Tsutaya Jūzaburō
Ama are Japanese divers famous for collecting pearls, though traditionally their main catch is seafood. The vast majority of ama are women.
Kappa (folklore)
…Japanese Books and Manuscripts, L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University. Two scaly-skinned kappa violate an ama diver underwater as her companion looks on from above. —Unsigned shunga erotic art "Abalone divers (awabi-tori)" (1788) of the Utamakura series, attrib…
Pearl divers in white uniforms, 1921
Pearl diver with headscarf, 1935