Waira is a demon with the body of a giant cow or rhinoceros that dwells hidden in the mountains and never comes down to the flat lands that appears in Japanese lore.
It walks along the ground as if crawling and digs up the earth with its hooked claw to eat the moles that it finds. The sex of a Waira can be determined by the color of its body, males are brown and females are red.
Waira first appears in Toriyama Sekien's The Illustrated Night Parade of A Hundred Demons. Other than its name, there is no further explanation about it.
"An unknown demon with the body of a giant cow or rhinoceros that dwells hidden in the mountains and never comes down to the flat lands. It walks along the ground as if crawling and digs up the earth with its hooked claw to eat the moles that it finds. The sex of a Waira can be determined by the color of its body: males are brown and females are red."