freedom of religion
A fixed legal and social phrase; synonymous with 信教の自由.
See also: 信教の自由
The Constitution of Japan guarantees freedom of religion.
Synonymous; 信教の自由 is more common in legal contexts, while 信仰の自由 is slightly broader in everyday use.
Compound of 信仰 (shinkō, 'religious faith') + の (no, possessive particle) + 自由 (jiyū, 'freedom').