Kim has been on the fast track since he debuted against former South Korean champion Taek Min Kim. In fact in his first 4 bouts he faced 2 former national champions and bouts 5 and 6 he faced international opponents.
What we have here is his 6th professional bout, a contest that saw him fighting Japan's Junya Nakada. Nakada had been stopped twice before though showed grit to push Kim as far as he did before a somewhat poor stoppage by the referee. Although the stoppage was poor it seemed that Kim was going to begin going through the gears in the final round a half and could well have given Nakada a bit of a pasting had the fight continued.
(Video courtesy of tlsdflskfjle)