As far as religion goes, about 50% of the South Korean population is atheist or irreligious, 25% is Buddhist, and the remaining 25% is Christian. This means that about 75% of the time, I'll be teaching basic Christian principles (like the existence of God) as well as the gospel of the LDS Church.
Busan is South Korea's second largest metropolis after Seoul and the world's fourth largest sea port. It is home over 3.6 million people.
Further inland is Taegu (DAY-gu). Taegu is the capital of the province and the second largest city in my mission. It is the fourth largest city in South Korea as well as the country's third largest metropolitan area being home to 2.5 million.
My mission also includes the island Jeju-do, off the southern coast. Jeju-do is a volcanic island and its own province, Jeju Province. Its climate is more temperate than the rest of the mission, and its population is around 500,000.