Kappa

Kappa is a River Imp or Sprite (Shinto), with the body of a boy and the head of a frog, and a dish on its head. Kappa also called Kawatarou 河太郎, Kawako 河伯 or Kawaranbe 河ランベ, Gatarou がたろう or Enkou 猿猴
Kappa is one of many Japanese Suijin (水神 - Water Deity) of Shinto mythology. Suijin are found in lakes, ponds, springs, wells, and irrigation waterways. They are often depicted as a snake, a dragon, an eel, a fish, a turtle, or a kappa.