Nikkō Onari Kaidō (日光御成街道) was established during the Edo period as a subroute to Nikkō Kaidō.
It was built for the shōgun to use as he traveled to Nikkō Tōshō-gū.
It is also referred to as the Nikkō Onarimichi and the Iwatsuki Kaidō.
The six post stations of the Nikkō Onari Kaidō, with their present-day municipalities listed beside them.