Yoon Son-ha (Hangul: 윤손하; born October 23, 1975, Jeonju, Jeollabuk-do, South Korea) is a South Korean actress, singer and television personality (gaijin tarento). She is signed onto Sony Music Japan's SME Records division. Since making her debut in the MBC dramas, she has acted in Korea and Japan, probably due to her fluency in Japanese as well as in her native Korean, where she has gained popularity from starring in the Fuji TV drama, Fighting Girl with co-star Kyoko Fukada. In Japan, however, she is known as Yun Sona (ユンソナ).

On July 4, 2006, Yoon announced that she got engaged to a Korean entrepreneur who lives in Seoul. and she moved her base of operation to South Korea. Afterwards, she shocked her Japanese fans and dimmed her star in the country by making statements that could be construed as being anti-Japanese. For instance, she said that Japanese food was a lacking cuisine and that Japanese people do not eat enough Kimchi, which she attributes to Korean people having good skin and high thinking processes, implying that Japanese people do not have as good skin or intelligence as Koreans. She also said about her marriage that she wanted to marry a Korean man and live in South Korea, alienating her Japanese male fans. The belief is that she had done this in order to curry favor with her new Korean fanbase, as they have a tendency to be very nationalistic, especially where Japan is concerned.