Canada is a country in the northern part of North America. Its ten provinces and three territories extend from the Atlantic to the Pacific and northward into the Arctic Ocean, covering 9.98 million square kilometres (3.85 million square miles), making it the world's second-largest country by total area. Its southern border with the United States, stretching 8,891 kilometres (5,525 mi), is the world's longest bi-national land border. Canada's capital is Ottawa, and its three largest metropolitan areas are Toronto, Montreal, and Vancouver. Various indigenous peoples inhabited what is now Canada for thousands of years before European colonization. Canada is a parliamentary democracy and a constitutional monarchy in the Westminster tradition, with a monarch and a prime minister who serves as the chair of the Cabinet and head of government. The country is a realm within the Commonwealth of Nations, a member of the Francophonie and officially bilingual at the federal level. It is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many other countries. Canada's long and complex relationship with the United States has had a significant impact on its economy and culture.

France, officially the French Republic, is a country whose territory consists of metropolitan France in Western Europe and several overseas regions and territories. The metropolitan area of France extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. It is bordered by Belgium, Luxembourg and Germany to the northeast, Switzerland, Monaco, and Italy to the east, and Andorra and Spain to the south. The overseas territories include French Guiana in South America and several islands in the Atlantic, Pacific and Indian oceans. The country's 18 integral regions (five of which are situated overseas) span a combined area of 643,801 square kilometres (248,573 sq mi) and a total population of 67.08 million. France is a unitary semi-presidential republic with its capital in Paris, the country's largest city and main cultural and commercial centre. Other major urban areas include Lyon, Marseille, Toulouse, Bordeaux, Lille and Nice. France has long been a global centre of art, science, and philosophy. France is considered a great power in global affairs.

India, officially the Republic of India, is a country in South Asia. It is the second-most populous country, the seventh-largest country by area, and the most populous democracy in the world. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the north; and Bangladesh and Myanmar to the east. India is a secular federal republic governed in a democratic parliamentary system. It is a pluralistic, multilingual and multi-ethnic society. India has become a fast-growing major economy. Indian movies, music, and spiritual teachings play an increasing role in global culture.

Japan is an island country located off the eastern coast of Asia. It is bordered by the Sea of Japan to the west and the Pacific Ocean to the east. Part of the Pacific Ring of Fire, Japan encompasses an archipelago of 6,852 islands; five main islands (Hokkaido, Honshu, Kyushu, Shikoku, and Okinawa) comprise 96% of the country's total area of 377,975 square kilometers (145,937 sq mi). Japan is officially divided into 47 prefectures and traditionally into eight regions. About three-fourths of the country's terrain is covered with mountains, with much of the remainder made up by flat coastal plains. As a result, Japan is one of the most densely populated and urbanized countries in the world. The largest urban area is the Greater Tokyo Area centered on the capital city of Tokyo, which is the most populous metropolitan area in the world and home to more than 38 million people. Japan is the eleventh most populous country in the world with a population of 126.2 million, of which 97.8% are ethnically Japanese. Japan has a unitary parliamentary constitutional monarchy, with the Emperor as the head of state and an elected legislature known as the National Diet.

Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa, bordering Niger in the north, Chad in the northeast, Cameroon in the east, and Benin in the west. Its coast in the south is located on the Gulf of Guinea in the Atlantic Ocean. The federation comprises 36 states and 1 Federal Capital Territory, where the capital, Abuja, is located. The constitution defines Nigeria as a democratic secular state. Nigeria has been home to a number of ancient and indigenous kingdoms and states over the millennia. With 206 million inhabitants, Nigeria is the most populous country in Africa. Nigeria is viewed as a multinational state as it is inhabited by over 250 ethnic groups, of which the three largest are the Hausa, Igbo and Yoruba. The official language of Nigeria is English, chosen to facilitate linguistic unity at the national level. Nigeria is divided roughly in half between Christians, who live mostly in the southern part of the country, and Muslims, who live mostly in the north. A minority of the population practice religions indigenous to Nigeria, such as those native to the Igbo and Yoruba ethnicities.

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK or U.K.) or Britain, is a sovereign country located off the north­western coast of the European mainland. The United Kingdom includes the island of Great Britain, the north­eastern part of the island of Ireland, and many smaller islands. Northern Ireland shares a land border with the Republic of Ireland. Otherwise, the United Kingdom is surrounded by the Atlantic Ocean, with the North Sea to the east, the English Channel to the south and the Celtic Sea to the southwest. The United Kingdom is a unitary parliamentary democracy and constitutional monarchy. The current monarch is Queen Elizabeth II, who has reigned since 1952, making her the world's longest-serving current head of state. The United Kingdom's capital is London, a global city and financial centre with an urban area population of 10.3 million. Other major cities include Birmingham, Glasgow, Leeds, Liverpool, and Manchester. The United Kingdom consists of four constituent countries: England, Scotland, Wales and Northern Ireland. Their capitals are London, Edinburgh, Cardiff and Belfast, respectively. Apart from England, the countries have their own devolved governments, each with varying powers, but such power is delegated by the Parliament of the United Kingdom, which may enact laws unilaterally altering or abolishing devolution.