The Tokaido Road is a novel by Lucia St. Clair Robson that takes place in 1702 during the Edo period of Japan. It follows the journey of a young woman named Sachi as she travels the famous Tokaido road to deliver a secret message. The book offers a vivid portrayal of the landscapes, customs, and social hierarchy of feudal Japan, as well as the challenges faced by women in a male-dominated society.