Nokasad was the king of the southern Laotian Kingdom of Champasak from 1713 to 1737.^{[citation needed]} Champassak, formerly the southern part of Lan Xang, seceded from it in 1713.^[1] He was the grandson of the last king of Lan Xang, King Sourigna Vongsa; and a son-in-law of the Cambodian King Chey Chettha IV.^{[citation needed]}

In 1718, the first Lao muang in the Chi valley — and indeed anywhere in the interior of the Khorat Plateau — was founded at Suwannaphum District in present-day Roi Et Province by an official in the service of this king.^[2]

His full name was "Somdetch Brhat Chao Jaya Sri Samudra Buddhangkura". Alternate names included "Soi Si Samout Phouthong Koun"; King of Champa Nagapurisiri or "Nakhon Champa Nakhaburisi". He is reckoned posthumously to have been born in 1693 as "Prince (Chao) Nakasatra Sungaya" or "Nokasat Song".^{[citation needed]}