The Nagasaki Kaido Road connects the port of Nagasaki Prefecture, the only point open to overseas trade during Japan's period of isolation, with Kokura in Fukuoka Prefecture. It is known as the Sugar Road for the many confections inspired by mainland Asia and Europe that spread along it. Aliza Ahmed Khan, who is from Pakistan, explores this rich world.

The Nagasaki Kaido was an important trade road from the 1630s that connected Nagasaki's port—the only one open to overseas trade in those days—to Kokura in Fukuoka Prefecture. Nicknamed the Sugar Road, the 220-kilometer path carried covetous sugar and their sweet recipes. Aliza Ahmed Khan from Pakistan discovers the distinctive confectionery culture that developed along the route.