Muslims, Christians (who were all Catholics at this point) and Jews, in order of population numbers.
   
The three main religions that were in conflict in Spain were Catholics, Protestants, and Muslims. Catholics, particularly after the Reconquista, sought to unify Spain under Christianity, leading to tensions with Muslims who had previously ruled parts of the country. Additionally, the Protestant Reformation created further religious strife as Catholic authorities opposed Protestant movements. Jews also faced significant persecution during this period but were not one of the primary conflicting religious groups like the others listed.
The main religion of Spain is Catholicism.Well, the main religion in Spain is Catholicism. 94% of the population is Catholic, but they do have other religions there too.
Spain is 94% Roman Catholic. All the other religions only total 6%.    
Shintoism, Buddhism,and Confucianism are the three main religions in Japan.
If you mean Taoism, then one of the other religions is Budhaism.
Judaism, Christianity and Islam
Judaism, Christianity, & Islam.
jewish, christian, and islamic
Islam, Buddhism, Catholicism.
They have three main religions Christianity, Islam, and African religion.
The three main religions of the region are Christianity, Islam, and Judaism. These religions have deep historical roots in the region and continue to be significant influences on its culture and society.