涂壁是日本福冈县传说的妖怪。在夜晚的步道中，若前方突然冒出一个无法让你绕过的墙壁便是妖怪「涂壁」，要让它消失的方法是拿起棒子朝它的下方攻击。

For the puzzle with the same name, see Nurikabe (puzzle).

The nurikabe (ぬりかべ) is a Yōkai, or spirit, from Japanese folklore. It manifests as a wall that impedes or misdirects walking travelers at night. Trying to go around is futile as it extends itself forever. Knocking on the lower left part of the wall makes it disappear. It has been suggested that the legend was created to explain travellers losing their bearings on long journeys.