noun
directional taboo avoidance travel
Archaic Heian-period practice: departing the night before a planned journey, traveling in a different direction to avoid an unlucky direction, staying overnight, and then proceeding to the actual destination the next morning. Related to the concept of 方塞がり (katatagari).
See also: 方塞がり
平安時代には、方違いのためにわざわざ前夜に出発することがあった。
During the Heian period, people would sometimes deliberately set out the night before to perform katatagai.