At the time of his K-1 debut, on July 17, 2004 in Seoul, Kaoklai weighted 78 kg (172 lb; 12.3 st), the lightest and youngest fighter ever to win a K-1 Openweight tournament.

[4] In September 2002, at the age of 19, Kaoklai fought against Charnvit Kiat T.B.Ubol for the vacant title of Rajadamnern Stadium championship at welterweight.

After this bout, the Thai promoter protested and asserted that the judges did not consider Kaoklai's technics of neck wrestling, clinching and knee strikes.

In the semis, he met Tsuyoshi Nakasako from Japan and earned a unanimous decision victory, sending him to the finals against Shingo Koyasu.

Kaoklai won the evenly fought battle in the extra round, collected 60 million ₩ and advanced to K-1 World GP 2004 Final Elimination, held in Nippon Budokan Arena, Tokyo, Japan .

Having to overcome 80 lb (36 kg) weight and 8 in height disadvantage Kaoklai's quick, hit-and-run strategy started to paying off at the end of second round.

On December 4, 2004, Kaoklai was the youngest and the lightest fighter ever to compete in the 12th annual K-1 World GP Championships, held in Tokyo Dome, Japan.

At the end of the first round Kaoklai landed a lightning-quick jumping right high kick which connected flush to the head of Mo sending him unconscious to the canvas.

On December 18, 2005, Kaoklai participated local event of SNKA in Yamanashi to fight against Moroccan kickboxer "Prince" Hamid Boujaoub who live in Australia.

On June 20, 2008, Kaoklai participated kickboxing event in Jamaica to fight against Clifton Brown from Canada for the vacant title of IKKC Muay Thai World Cruiserweight Championship.

On March 14, 2010, Kaoklai fought against Magnum Sakai who was rated as #16 from Japan for the vacant title of WBC Muay Thai World Light heavyweight championship in El Monte, California, United States.