They call it the “Jerusalem of the East.” A small, divided peninsula on the edge of Asia that — against every historical and statistical expectation — became one of the most remarkable Christian nations on earth. South Korea today is home to some of the world’s largest churches, sends more missionaries per capita than almost any country on the planet, and has built a model of Christian community that has inspired believers across six continents.
But the story of Christianity in South Korea is not a simple success story. It is a story of fire — and the questions that come after the fire. And for every global Christian who cares about the future of the gospel, it is essential reading.
From a Tent to the World’s Largest Church
On May 18, 1958, a 22-year-old man named David Yonggi Cho and his future mother-in-law, Choi Ja-Shil, held the first service of what would become the most extraordinary church in modern history — in Choi’s living room, with an attendance of five people. Sixty-seven years later, Yoido Full Gospel Church in Seoul stands as the world’s single largest congregation by attendance, with between 150,000 and 200,000 people attending its numerous Sunday services in multiple languages, and a total membership of around 580,000.
That is not a typo. One church. Half a million members. Started in a living room.
📺 Above: A glimpse of Sunday worship at Yoido Full Gospel Church, Seoul — the world’s largest congregation.
Yoido’s story mirrors the broader miracle of South Korean Christianity. In 1960, Christians represented just a small fraction of the Korean population. Today, 31% of South Korea’s 50 million people identify as Christian — a transformation that unfolded within a single lifetime. Christian missionaries founded 293 schools and 40 universities in the country, including three of the top five academic institutions. And after the United States, South Korea is the world’s largest supplier of Christian missionaries — a staggering achievement for a country that was itself a mission field just a century ago.
The Pyongyang Revival — Where It All Began
To understand Korean Christianity, you have to go back to 1907 and the Great Pyongyang Revival — an event so transformative that the city became known as “the Jerusalem of the East.” In the midst of Japanese colonial rule, Korean Christians gathered in prayer and repentance, and what broke out changed the nation. The revival was led not by a Western missionary, but by a Korean pastor named Sonju Kil — a fact that underscores something important about Korean Christianity from the very beginning: it was, at its heart, indigenous.
The revival emphasised inner transformation — a personal experience of conversion rather than merely intellectual agreement with doctrine. That emphasis has defined Korean Christianity ever since. Early morning prayer — a practice still distinctive in Korean church life today — emerged from this era, as believers gathered before dawn to seek God together in a posture of radical dependence.
Christianity’s association with Korean national identity deepened through decades of occupation and war. Christians stood against oppression, risked their lives for justice, and provided care to those uprooted by rapid social change. As historian Philip Jenkins observed: “Christians stood up against oppression and injustice, risking their lives in the process, and they offered ordinary people a vision of a better life.”
The World’s Second Largest Missionary-Sending Nation
Perhaps the most remarkable dimension of Korean Christianity is its missionary outreach. South Korea became the second largest missionary-sending country in the world — behind only the United States. The Fourth Lausanne Congress held in Incheon, South Korea in September 2024 — marking the 50th anniversary of the Lausanne Movement — highlighted Korea’s extraordinary global mission impact. The Korean passport, which allows visa-free travel to 191 countries, has become a practical tool enabling Korean missionaries to reach some of the world’s most restricted nations with remarkable freedom.
📺 Watch: The Korean Church’s Global Mission Impact — Lausanne Movement
The Challenges Ahead — and Why They Matter
No honest account of Korean Christianity can ignore its present challenges. After decades of explosive growth, the Korean church is now wrestling with difficult questions about sustainability, relevance, and the next generation. Youth attendance has declined. The prosperity gospel — which took deep root during Korea’s rapid economic development — has generated scandal and disillusionment. And the extraordinary demographic collapse underway in South Korean society poses existential questions about the future.
These are not signs of failure. They are signs of a church that has grown up and is now grappling with the mature challenges of a faith community that has won its battles and must now think about what comes next. The Jerusalem of the East is not finished. It is evolving.
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🌐 Follow Yoido Full Gospel Church: yfgc.church | Instagram @yoido_church
