The history of Tohsang Heritage began in 1992, when Tohsang Ubon Hotel was founded in Mueang Ubon Ratchathani district. Tohsang Ubon Hotel was among the first hotels in Ubon Ratchathani that are completed with high standard facilities and services, and is regarded as Ubon Ratchathani’s leading hotel for several decades. Ever since the opening, the hotel has been continually upgraded and renovated, and renamed into Tohsang Heritage Ubon Ratchathani in 2021.

In 1994, Tohsang Khongjiam Resort was established by the Mekong River in Khong Chiam district to offers guests the opportunity to enjoy a relaxing stay amidst the serene nature, as well as near numerous tourist attractions. Three decades later, it was renamed into Tohsang Heritage Khongjiam. New innovations were introduced to enhance the management and operation of the hotel, while the guest rooms, villas, and landscape were renovated. Tohsang Heritage Khongjiam has been and will always continue to be providing guests with warm hospitality and also strive to be a green hotel, where the energy resources are efficiently utilized, and the environmental management is implemented.