Article by the Japan National Tourism Organization published on 2018/11
For the two hundred years or so between the 1600s and the mid-1800s, Japan practiced an isolationist policy that heavily restricted contact and trade with foreign nations. During that time, Nagasaki was the only place where trade with the outside word was allowed. Chinese, Dutch, and Portuguese cultures in particular took widespread hold in the area, blending with the native Japanese culture to produce something entirely unique. If you take a trip to Nagasaki, you’re likely to feel that it’s both foreign and deeply familiar in the same instant.