It usually includes humorous or strange characters and situations . It also includes many supernatural creatures , such as kami ( gods and revered spirits ) , yÅ kai ( monster-spirits ) ( like oni , kappa , and tengu ) , onryÅ ( ghosts ) , dragons , and animals with supernatural powers like the kitsune ( fox ) , tanuki ( raccoon dog ) , mujina ( badger ) , and bakeneko ( transforming cat ) . It often involves humorous or bizarre characters and situations and also includes an assortment of supernatural beings , such as bodhisattva , kami ( gods and revered spirits ) , yÅ kai ( monster-spirits ) ( such as oni , kappa , and tengu ) , yÅ `` rei ( ghosts ) , dragons , and animals with supernatural powers such as the kitsune ( fox ) , tanuki ( raccoon dog ) , mujina ( badger ) , bakeneko ( transforming cat ) , and baku ( tapir ) , as well as sacred objects and possessed objects .