조선왕조실록
In 1983, he and writer Shin Bong-seung created the landmark eight-year-long series "500 Years of Joseon", which shifted the genre of historical/period dramas (called "sageuk" in Korean) from monotonous historical chronicles into the interpretation of bonafide records like the Annals of the Joseon Dynasty. His follow-up, Kim Jung-soo-penned contemporary drama "My Mother's Sea" (1993) was also popular, with a peak viewership rating of 51.6%.