[2] Kongnapa made his kickboxing debut against Hideaki Yamazaki in September 2016, a fight which he won by unanimous decision.
Before that, he fought in muay thai, winning the WMPF World Super Lightweight title and successfully defending it twice.
In the quarterfinals, he won a unanimous decision against Koya Urabe, but lost the semifinal bout against Ren Hiramoto by a first round knockout.
[12] At K-1 World GP 2020 Winter's Crucial Bout, Gonnapar fought Kenta Hayashi for the K-1 Lightweight title.
[14] In his first title defense, Gonnapar is expected to face Taio Asahisa at K-1 World Grand Prix 2021.