Kyochon, the biggest franchise, posted a 13-percent increase to 291 billion won ($255 million) last year from $257 billion won a year earlier, according to the statistics compiled by the Financial Supervisory Service.

BHC witnessed a whopping 26-percent surge to 232 billion won last year from the previous year, taking back the status as the country's second largest chicken franchise.

BBQ slipped to third place with 219 billion won, although up 1.8 percent from the previous year. Goobne Co. came in fourth with 146 billion won in sales last year, up 50 percent from the previous year.

Smaller franchises such as Mexicana, Pericana and Cheogagip also enjoyed modest increases while Nenechicken became the only major franchise to suffer a sales drop. Nenechicken's sales fell 7 percent to 56.7 billion won last year from the previous year. 

The sales increase of chicken franchises comes amid the growing number of affiliated outlets going out of business due to tense competition. The number of chicken franchise stores that shut down jumped 10 percent to 2,793 in 2015 from the previous year and the figure is likely to soar this year, industry data showed.

"Some say the chicken franchise market is already saturated, but the chicken franchise business is still the first choice for the self-employed," an industry source said. "The market itself has grown recently with consumers reacting favorably to new items released by franchises." (Yonhap)