Portugal–Spain border disputed between the two countries for two hundred years. A microstate existed previously on the border called Couto Misto. Districts on the Portuguese side of the border from North to South: Provinces on the Spanish side of the border from North to South: Portugal and Spain signed the Schengen Agreement in June 1991 which came into effect on 26 March 1995, making Portugal and Spain part of the Schengen area and thus the border then became an Open border. Portugal has since reintroduced border checks several times along the border with Spain, during the UEFA Euro 2004 championships, during the
Japan–Russia border into the Soviet Union in 1945. Russia treats the islands as an integral part of the country. There are no border crossing points on the Russian-Japanese border, as it is a purely maritime boundary. During the existence of the land border in Sakhalin (1905-1945), it was crossed by one road. Soviet–Japanese border conflicts Japan–Russia border The Japan–Russia border is the "de facto" maritime boundary that separates the territorial waters of the two countries. According to the Russia border agency, the border's length is 194.3 km. The two countries do not share a terrestrial border, although in 1905-1945 the Russian Empire,