Yoon Son Ha was born on November 17, 1975, in Jeonju, South Korea. She began acting in Korean dramas in 1994, appearing in Salut D'Amour. In 2000, she made her first appearance in a Japanese drama, Melody of the Heart, and in 2001, she co-starred with Kyoko Fukada in Fighting Girl. Her popularity in Japan took off, and she has now become more prominent in Japan than in Korea. In Japan, she is known by the name ユンソナ (Yun Sona).

In 2004, she started a singing career under the name sona.

In July 2006, Yoon Son Ha announced her engagement to Korean businessman Jae-Hyeon Sin. Their wedding was held on September 16, 2006.