 In the Genpei <unk> , written in the late Kamakura period , a god appears to Go @-@ Shirakawa and gives a detailed account of tengu ghosts . He says that they fall onto the tengu road because , as Buddhists , they cannot go to Hell , yet as people with bad principles , they also cannot go to Heaven . He describes the appearance of different types of tengu : the ghosts of priests , nuns , ordinary men , and ordinary women , all of whom in life possessed excessive pride . The god introduces the notion that not all tengu are equal ; knowledgeable men become daitengu ( <unk> , greater tengu ) , but ignorant ones become <unk> ( <unk> , small tengu ) . 
