It depends on where you go. If you go to the Middle East and the surrounding regions, you'll find that the majority of people there are Muslim. Islam is also popular in the area. If you go to any European countries you will more likely find Catholic churches, maybe even Lutheran if you go to Germany.
There is no one main religion, its different throughout the various countries, and even then, its different through the various regions of that country. Religion in Asia ranges from Buddhism, Shintoism, Islam, Hinduism, Christianity, plus countless of other religions.
This needs more information on the countries and their main religion, then I can give you a valid answer.
Buddhism is the predominant religion in the majority of southeast Asian countries and Islam is also widespread but only two countries have Catholicism as their main religion, the Philippines and East Timor.
Buddhism is the predominant religion in the majority of southeast Asian countries and Islam is also widespread but only two countries have Catholicism as their main religion, the Philippines and East Timor.
None.
The main religion in Spanish-speaking countries is Christianity, with the majority of the population being Roman Catholic.
No African countries practice Buddhism as their main religion.
Buddhism & Confucianism.
Islam
bla bla bla
There are 50 Muslim majority countries. Refer to question below.
Buddhism is the predominant religious belief of the majority of Southeast Asian countries and Islam is also widespread, but only two countries have Catholicism as their main religion, the Philippines and East Timor.