Junto Nakatani might’ve delivered the punch of the year Saturday in Las Vegas.

The Japanese slugger stopped Andrew Moloney with a massive left hand in the 12th round to the win the vacant WBO 115-pound title on the Devin Haney-Vasiliy Lomachenko card, giving the Japanese fighter a major belt in a second division.

The official time of the stoppage was 2:42 of the final round.

Nakatani (25-0, 19 KOs) put the game, but overmatched Moloney down three times — in the second, 11th and 12th rounds — but it was the last one that won’t soon be forgotten.

The new champion appeared to be on his way to a wide unanimous decision victory when the tall, powerful southpaw landed a wide left that instantaneously rendered Moloney unconscious.

Moloney (25-3, 16 KOs) lay bloodied and prone for several minutes before getting to his feet and congratulating Nakatani.

The 25-year-old Nakatani, the former WBO 112-pound titleholder, has now stopped seven of his last eight opponents in an impressive run that has made him one of the top little fighters.

Story originally appeared on Boxing Junkie