RAON is a South Korean particle physics laboratory within the Rare Isotope Science Project (RISP) that is being constructed in the outskirts of Daejeon neighboring Sejong, South Korea by the Institute for Basic Science (IBS). It was expected to be finished by 2021 before getting pushed back to 2025.

Daejeon is South Korea's fifth-largest metropolis, with a population of 1.5 million as of 2019. Located in a central lowland valley alongside forested hills and the Geum River, the city is known for its technology and research institutions, and for celebrating its natural environment, with most mountains, hot springs, and rivers freely open for public use. Daejeon serves as a hub of transportation for major rail and road routes, and is approximately 50 minutes from the capital, Seoul, by KTX or SRT high speed rail.