Junior bantamweight titleholder Naoya Inoue, nicknamed "Monster," returned from a one-year layoff and resembled his moniker by blowing away Walter Parrenas in a second-round knockout victory to retain the belt on Tuesday in Tokyo.
Inoue won a 115-pound world title last Dec. 30, when he stopped Argentina's long-reigning titleholder Omar Narvaez in the second round, also in Tokyo.
Inoue badly injured his right hand in the fight, however, and had been sidelined until Tuesday, when he made his first defense against Parrenas.
Inoue, a Japanese prodigy, is already a two-division titleholder at age 22, having won a junior flyweight world title in his sixth fight in April 2014. He made one defense of his 108-pound title and then jumped up two weight classes and crushed Narvaez.
Inoue (9-0, 8 KOs) did the same thing to Parrenas (24-7-1, 21 KOs), 32, of the Philippines, winning the first round on all three scorecards and then finishing him with two knockdowns in the second round.
Inoue dropped Parrenas first with a heavy right hand to the head. Parrenas survived but quickly went down again when Inoue backed him into the ropes and dropped him to a knee with a three-punch combination. Referee Michael Ortega began the count but halted the fight, calling it at 1 minute, 20 seconds.
In the co-feature, Japan's Akira Yaegashi (23-5, 12 KOs), a former strawweight and flyweight titleholder, moved down in weight and won a title in a third weight division by outpointing Mexico's Javier Mendoza (24-3-1, 19 KOs), 24, to win a junior flyweight world title in a brutal fight.
Yaegashi, 32, won 120-107,119-109 and 117-111 on the judges' scorecards. Mendoza was making the second defense of the title he won by unanimous decision against Ramon Garcia Hirales in September 2014.
The fight was action-packed, but Yaegashi, best known for his 10th-round knockout win against Pornsawan Porpramook to win a strawweight title in the 2011 ESPN.com fight of the year, got the better of Mendoza throughout a hard-hitting bout.
Yaegashi landed numerous right hands to Mendoza's head and face, cut him over the left eye and nearly stopped him with an onslaught of clean punches in the 12th round.