Kappa (河童) are yōkai who live in rivers, lakes, swamps, etc. They have webbed hands and feet and a plate above their head which is always wet. They love cucumbers, fish and fruit.
- Akagappa are kappa whose skin is tinted red.
- Numakappa (沼河童) are kappa which live in swamps.
- Gangi Kozō is a kappa variant that catches fish by the riverside with its teeth.