Kongchai was born in the Prakhon Chai District of
Buriram Province. He started boxing at 10 years old and started fighting soon after. Originally called Kongsiam, he later changed his ring name to Kongchai. Kongchai faced
Akram Hamidi at
ONE Friday Fights 66 on June 8, 2024. He lost the fight by first round technical knockout. On November 15, 2024, Kongchai defeated Chokpreecha P.K.Saenchai by unanimous decision. They both received a fight of the night bonus. On January 10, 2025 Kongchai faced Ramadan Ondash in the main event of
ONE Friday Fights 93. He lost the fight by unanimous decision. Kongchai rematched Chokpreecha P.K.Saenchai at
ONE Friday Fights 108. He won the fight by knockout in the second round. ==Titles and accomplishments==