Almost all of them have a capital. Some have two or three.
Countries have capitals cities. They do not have capital countries.
France - Paris Japan - Tokyo Canada - Ottawa Australia - Canberra Brazil - Brasília
No country is the capital of Asia. First, Asia is a continent with many countries. Second, a capital is a city, not a country. As Asia is not a country, then it does not have a capital city. The countries in Asia would each have their own capital cities, but there is no one city that is the capital of Asia.
Colombia's capital city is Bogotá.
That is the capital and largest city in Nepal.
Quito is the capital city of Ecuador.
Manila is the capital of the Philippines.
Managua is the capital city of Nicaragua.
The capitals of the countries that border South Africa are: Namibia - capital is Windhoek. Swaziland - capital is Mbabane Botswana - capital is Gaberone Lesotho - capital is Maseru Zimbabwe - capital is Harare Mozambique - capital is Maputo
There are no countries in Canberra. It is a city, the capital of Australia.
There are no countries in the Antarctic continent with official capitals, as the continent is governed by the Antarctic Treaty System, which does not recognize any country's sovereignty over the land.
The capital of Laos is VientianeThe capital of Myanmar (or Burma) is Naypyidaw