The young Kim's haircut is dubbed a "youth" or "ambition" hairstyle in North Korea, South Korea's Chosun Ilbo newspaper has reported.

Earlier this week, North Korean state news agency KCNA quoted barber An Su-gil as saying the short-cut, medium-cut and square-cut hairstyles are now popular among young men.

North Korean newspaper Rodong Sinmun wrote in September that neat and short hair for young people makes them "captivating."

"A young man with (an) ambitious high sided haircut looks so sobering and stylish," the paper added.

South Korea's Yonhap news agency said that North Korean young men prefer short hairstyle for sanitary reasons, not just because they want to look neat and ambitious.