Known as Gwan Un-jang in Korea, he was a general during China’s Three Kingdoms period. Renowned for loyalty and valor, he has been venerated in shrines in China since the early Ming dynasty (1368–1644).
During the Korean-Japanese War of 1592–1598, when soldiers of the Ming dynasty aided Korea in fighting off the invading Japanese forces, they set up a shrine to the spirit of Guan Yu, and during the war, the general’s spirit was said to have appeared. In the last year of the war, the Korean government set up another shrine to Guan Yu, and since that time, there has been a practice in Korea of honoring his spirit. Jeung San Do’s Unjangju Mantra summons the courage and strength of Guan Yu in driving away vengeful spirits and lurking demons.