The mythical creatures of japan include.... the kappa,oni, and tengu.
The kappa is a duck-billed turtle that lives in the water. The myth is, that if children wander off from their parents, the kappa will cone out of a nearby lake and eat them.
The oni is the Japanese ogre. it is pictured having a horn and wearing only a lionskin loincloth. They are the servants of King Emma, lord of hell.
The tengu are the Japanese goblins.They are pictured having wings and a reddish face. They have the power to cause natural disasters adn control mountains.
this is all I could find....hope this helped:)