The kawataro is a variety of kappa or water imp which likes to eat people and to practice sumo. An indentation on top of the creature's head is filled with water. The
Kappa (folklore) - Wikipedia
Kappa water sprite
Kappa - River Imp (Kami) in Japanese Shinto and Buddhist Traditions
Kappa (folklore) - Wikipedia
KAPPA : WATER SPIRIT Wutikai - Illustrations ART street
Kappa (Fabelwesen) – Wikipedia
Kappa (Fabelwesen) – Wikipedia
Cultural Anthropology - Kappa Monsters - Kappa Szörnyetegek
Kappa (folklore) - Alchetron, The Free Social Encyclopedia