Japanese Kappa Maki Roll of Rice, Nori and Cucumber Stock Photo - Image of dinner, white: 184258912
The adorable frog-alligator-platypus tetranodon is a mix of a kappa, a water dwelling yokai, and a sumo wrestler. It even eats cucumber-like slugs (on the monster hunter twitter), much like the kappa. :
Kappa Yokai Monster with Cucumber" Hardcover Journal for Sale by CorissaBees | Redbubble
Kappa Zuke (Japances Pickled Cucumbers) 4.4LB/PK – True World Foods DC