The Japanese wagtail is about 20 cm long. The sexeslook similar; they have white underparts and black upperparts, throats, and backs. Their supercilia are also white. They have black beaks and dark grey legs and feet. The plumage of a juvenile is greyer than that of an adult.
Taxonomy and systematics
The bird's Latin species name, grandis, means large.
Conservation
The Japanese wagtail is classed as a species of least concern by the IUCN. It has a stable population.