He continued with music for his graduate studies, attending Goldsmiths College in London.
He won a scholarship and a British Council support grant for further study in Piano Performance at the University of Reading.
Among his works is the piano sonata, "Glory to Our Great Kings", which was presented at the United Nations as part of the commemoration of the 50th session of the UN General Assembly in October 1995.
Nat Yontararak married Wongdeaun Indharavud (Pa-Wongdeaun Yontararak), who performed the leading role in Vichit Kounavudhi's 1978 drama - First Wife (Mia Luang) and Suwat Woradilok's 1979 film - Son of the Slave (Look Thas).
Wongdeaun Indharavud is the great-granddaughter of Chao Keo Naovarat, the last king of Chiang Mai.