There is an excellent manga about kappa - Japanese mythological water spirits that are popular in Japanese folklore. Though one might think that the manga's version is way too pretty for the traditional interpretation of the creatures. I don't mind, and the manga was a pure delight to read.
by 梶原 にき -(Kajiwara Niki)
河童 --かっぱ-- (n) (1) kappa (mythical water-dwelling creatures)