Choi Sang-Ok (Korean: 최상옥; Hanja: 崔尙玉, 1928–2015)[1] was a South Korean restaurateur. She was the founder of Korean restaurant YongSuSan, the first restaurant in South Korea to adopt western styles of service (dining, waiting staff, etc.) with Korean food.[2][3] She was born and raised in Kaesong.[citation needed]
Her restaurant was named after a mountain in Kaesong. It specializes in Kaesong-style and Korean royal court cuisine.[citation needed]