Mizu no Tomodachi KappamanWater Friend Kappaman; 水のともだちカッパーマン; Mizu no Tomodachi Kappaman

Kawataro, half human, half kappa, lives as a human, because his father, a kappa, wished so. Kawataro travels to find his mother who disappeared when he was young. On his trip, he encounters various youkai.