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.
Finland, Poland, Lituania, Ukraine, Latvia, and Estonia.
The two geographic features are The Andean Mountain range and the Amazon river basin in the northern and central regions of the continent.
1991. Although its fall lapsed somewhat into 1992, as well.
