Tenshin Nasukawa picked up his first stoppage as a pro boxer.

It came in anticlimactic fashion, as a right ankle injury left Luis Robles unable to continue after three rounds. Nasukawa looked sharp in his third pro fight but was informed that the fight was stopped between rounds in their ESPN+ co-feature Tuesday at EDION Arena in Osaka.

Nasukawa looked sharp from the start in just his third pro bout. The famed kickboxer has been matched aggressively since his pro debut last April in Tokyo. On that night, he outpointed Yuki Yonaha who fell just short versus unbeaten second-generation boxer and sixteen-fight pro Juiki Tatsuyoshi on Tuesday's undercard.

Robles was brought in as a step-up in competition. The 25-year-old Mexico City native—who is guided by legendary Hall of Fame trainer Ignacio 'Nacho' Beristain—was never stopped in his previous 18 bouts, but was outclassed from the opening bell. 

Nasukawa's stiff left jab was on point, and set up power shots as he effortlessly worked his way inside. Nasukawa was able to score with straight left hands and looping body shots as Robles was forced to fight in reverse. 

Robles attempted to turn the tide in round three. Nasukawa cornered the visiting Mexican, who was able to hook his way out of clinches and also connect with a right hand to the body. 

Nasukawa's hand speed was the big difference in the fight. He quickly turned the tide and even played the crowd in the closing seconds of the third round. 

It turned out to be the last piece of entertainment from the crowd.

Robles was pinned to his stool as his trainers loosened the laces on his right shoe. Referee Nobuto Ikehara informed Nasukawa's corner that their opponent was done for the night, which prompted a tempered celebration. 

The outcome marked the first stoppage defeat for Robles (15-3-1, 5KOs), whose prior blemishes were a ten-round draw, eight-round split decision and four-round unanimous decision. 

Nasukawa advances to 3-0 (1KO) with his first win inside the distance. All three pro bouts have been packaged with reigning junior flyweight king Kenshiro Teraji (22-1, 14KOs), who defends his lineal/WBC/WBA championship versus WBA mandatory challenger and former interim titlist Carlos Canizales (26-1-1, 19KOs) in Tuesday's main event.

Jake Donovan is a senior writer for BoxingScene.com. X (formerly Twitter): @JakeNDaBox