Japan has many mountains, thus, the outsiders could not easily enter Japan and Japanese could not leave the country. And, thus the self-isolation was helped by the presence of a mountain terrain. This policy was implemented by Togukawa, who insisted on preventing Japan from foreigners.
Once the Spanish settled in the Caribbean they quickly began importing slaves from Africa to work in the sugar mills. Sugar was in incredibly high demand in Europe at the time.
In addition to its strategic military importance, the Golan Heights is an important water resource, especially at the higher elevations, which are snow-covered in the winter and help sustain baseflow for rivers and springs during the dry season
