隣国が 1個しかいない国

Countries bordering only one other country Country Neighbour Border length (km) Notes  Brunei  Malaysia 381 Borders the Malaysian state of Sarawak on the island of Borneo.  Canada  United States 8,893 The border around the area of Hans Island between Canada and Greenland (a Danish dependent territory) is disputed and undefined. Canada also shares a maritime border with Saint Pierre and Miquelon, a French dependent territory  Denmark  Germany 68 Denmark is connected to Sweden via the Øresund Bridge. The border around the area of Hans Island between Canada and Greenland (a Danish dependent territory) is disputed and undefined. See dependent territories below.  Dominican Republic  Haiti 360 On the island of Hispaniola.  Gambia  Senegal 740  Haiti  Dominican Republic 360 On the island of Hispaniola.  Ireland  United Kingdom 360 The Republic of Ireland borders the United Kingdom on the island of Ireland.  Lesotho  South Africa 909 Lesotho is an enclave entirely surrounded by South Africa.  Monaco  France 4.4 Monaco is surrounded on three sides by France, the last bordering the Mediterranean.  Papua New Guinea  Indonesia 820 On the island of New Guinea.  Portugal  Spain 1,214  Qatar  Saudi Arabia 60 The planned Qatar–Bahrain Friendship Bridge would connect Qatar to Bahrain.  San Marino  Italy 39 San Marino is an enclave entirely surrounded by Italy.  South Korea  North Korea 238 On the Korean Peninsula, at the Demarcation Line. The two countries are separated by a 4 km wide Demilitarized Zone.  Timor-Leste  Indonesia 228 On the island of Timor.  United Kingdom  Ireland 360 The United Kingdom borders the Republic of Ireland on the island of Ireland. The UK is also connected to France via the Channel Tunnel. The UK sovereign base areas Akrotiri and Dhekelia share borders with Cyprus. Gibraltar, a UK overseas territory, shares a border with Spain. See dependent territories below.  Vatican City  Italy 3.2 The Vatican is an enclave entirely surrounded by Italy.