Answer 1
Although only half of South Koreans profess an organized religion, sociologists consider the society to be very religious. Most of those who are non-affiliated practice syncretism in regards to the other faiths. The urban and more educated sectors are the most religious, with rural areas practicing more syncretic beliefs and usually being classified as non-religious. Among those who do affiliate with an organized religion, the majority accept Christianity (49%). There's a considerable Buddhist population too (35%), and a small Islamic population (<10%).
Also, South Korea sends out the second most Christian missionaries in the world (after the US).
Answer 2
I don't believe South Korea has one religion that is the most common. It is a hodgepodge. While Protestant Christianity is growing, it only is accepted by 20% of the population. It does do well in the cities. 11% of the Population are Catholics and 25% are some kind of Buddhist. Another 20% are not particularly religious, but do follow some traditional Buddhist customs and accept some of the precepts of Confucius. Another 2% belong to the Moonies or some other cult. The remainder are secular, atheist and agnostic and so don't have a recognized Religion.
North Korea is totalitarian Communist and religion is forbidden there- it is officially atheist. South Korea is evenly split between Christianity and Bhuddism, with some Korean Shamanism on the rise as well.
Buddhism
Christianity
[Confucianism]
There are many people with no professed religion.
Buddism is the most, there are also some Christianity and Islamic.
this was said by my south Korean frieng jimmy the whang chow the main religious belief is rastafari
Christianity 29% and Buddhism 22%, although many Koreans practice no religion at all.
Christianity
It is christianity.
In North Korea it's - kill whitey In South Korea it's - budda
They believe in the same god and most of the religions are Christians
dark brown(nearly black) is the most common eye color in korea.
We recognize all religions. Lutheranism is the most common.
korea's most common is buddism budda or the enlightened one.
rice
The most common religions in Japan are Buddhism and Shintoism, though most Japanese do not self identify as singular adherents of a particular religion.
Buddhism.
Orthadox.About 41%
Narcisim
Deities, rituals, and congregations tend to be common to most traditions.
Buddhism, Confucianism, & Christianity.