Caius of Korea
Caius of Korea was a Catholic martyr of Japan, known for his spiritual seeking and eventual conversion to Catholicism. He served the sick, particularly lepers, and aided missionaries before being martyred by burning at the stake in Nagasaki.
Key Facts
- ›Caius was born in Korea and initially placed in a Buddhist monastery by his parents.
- ›He left the monastery seeking peace and lived as a hermit in a cave, reportedly sharing it with a tiger.
- ›During the Japanese invasion of Korea in 1592, Caius was taken prisoner and shipwrecked in Japan, where he was nursed back to health by a Christian.
- ›He converted to Catholicism and was baptized, recognizing Jesus Christ as the figure who had appeared to him in his cave.
- ›Caius served the sick, including lepers, and later worked as a catechist in Japan, assisting missionaries.
- ›He was martyred by burning at the stake in Nagasaki on November 15, 1624, after being arrested for harboring missionaries.

Catholic Martyrs of Japan
About Caius of Korea
Caius of Korea (1571–1624) is venerated as one of the Catholic Martyrs of Japan. His life story, as recorded by missionaries like Claude-Charles Dallet, highlights a profound spiritual quest that ultimately led him to embrace Catholicism and face martyrdom.
Life and Historical Context
Born in Korea, Caius was initially placed in a Buddhist monastery by his parents. Dissatisfied with the peace he sought there, he left to live as a hermit in a mountain cave. His journey took a dramatic turn when, during the Japanese invasion of Korea in 1592, he was taken prisoner and transported to Japan. Following a shipwreck, he was nursed back to health by a Christian.
Intrigued by Buddhist life, Caius lived in a prominent pagoda in Kyoto, but again found himself unable to attain the spiritual solace he desired. During an illness, visions led him to leave the temple and seek out Christian instruction. He was baptized into the Catholic faith, recognizing Jesus Christ as the divine figure who had previously appeared to him.
Ministry and Martyrdom
After his conversion, Caius devoted himself to charitable works, particularly serving the sick and lepers. He also traveled to the Spanish Philippines to serve an exiled samurai and later returned to Japan to work as a catechist. He assisted missionaries by preaching to Koreans and Japanese in their native tongues. His commitment to his faith led to his arrest for harboring missionaries. On November 15, 1624, Caius was martyred by burning at the stake in Nagasaki alongside James Coici.
Legacy
Caius of Korea was beatified by Pope Pius IX on July 7, 1867, along with other Catholic martyrs of Japan. His life is often cited as an example of sincere spiritual searching and unwavering faith in the face of persecution.
Source: Wikipedia ↗
Frequently Asked Questions
Who was Caius of Korea?
Caius of Korea was a Catholic martyr of Japan, born in Korea in 1571. He is recognized for his spiritual journey, conversion to Catholicism, and dedication to serving the sick and aiding missionaries before his execution.
What led Caius of Korea to Catholicism?
After a period of spiritual seeking in various monastic and hermit settings, Caius was taken prisoner in Japan. There, he encountered Christianity, was baptized, and recognized Jesus Christ as a figure who had previously appeared to him in a vision.
How did Caius of Korea serve his faith?
Following his conversion, Caius dedicated himself to serving the sick, especially lepers. He also worked as a catechist, assisting missionaries by preaching in his native Korean and Japanese languages.
When and how did Caius of Korea die?
Caius of Korea died on November 15, 1624, in Nagasaki, Japan. He was martyred by burning at the stake after being arrested for harboring missionaries.
When was Caius of Korea beatified?
Caius of Korea was beatified by Pope Pius IX on July 7, 1867, as one of the Catholic Martyrs of Japan.
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