If we take time as a measure of the spread of religion,then since its establishment ,Islam is the religion which spread or still spreading rapidly in Asia followed by Christianity.
the most popular religion in Asia is Mahayana Buddhism
I Don't believe it is rapidly spreading today. 2000 years ago most people were dirt poor, religion is a way out, so to speak. "Your life is crap now, but believe in my imaginary god and after you die your 'life' will be all milk and honey"
China is the largest country in Asia with an area of 9596961 kilometer square which is equivalent to 3694982 square miles. Islam which originated in Saudi Arabia is the most widely spread and the largest religion in Asia.
Yes, it is.
buddhism
Satanism
There isn't like one major religion but here are the most common:BuddhismChristianityConfucianismHinduismIslamJainismJudaismSikhismTaoismZoroastranism
Buddhism spread to: China Japan Korea Most of Asia. Buddhism spread to: China Japan Korea Most of Asia.
Religion..!! Islam
Buddhism first spread throughout India. Then it spread into China. As it spread into China it spread into Sri Lanka and then to Southeast Asia. From China it spread into Tibet, Korea and Japan. As of now Buddhism is practiced in all of the continents except Antarctica, (unless of course a Buddhist happens to be visiting). Buddhism is most prevalent in Asia and least prevalent in Africa. Buddhism is the fastest growing religion in Europe and North America. So Buddhists now are everywhere
In most instances they did not and do not seek to proselytize. The spread of their religion occurred as Jews settled in those areas.
Islam