is a former professional boxer from Japan. He is the former WBC and lineal flyweight champion, and former Japanese and OPBF flyweight champion. Professional career Naito made his professional debut in October, 1996. He compiled an undefeated record, and challenged future WBA flyweight champion Takefumi Sakata for the Japanese flyweight title on July 16, 2001, but failed to win the title in a 10-round draw. Naito traveled to Thailand in 2002 for his first world title shot, challenging Pongsaklek Wonjongkam for the WBC and lineal flyweight titles. Naito was knocked out only 34 seconds into the first round, setting the record for the fastest knockout in a world flyweight title match ever. On June 6, 2004, Naito dominated his opponent to win the Japanese flyweight title. He made his first defense later that year, knocking out the challenger only 24 seconds into the first round to set the record for the shortest Japanese flyweight title match ever. He made two defenses before returning his title. Naito challenged Wonjongkam for the second time on October 10, 2005, but lost by decision after the fight was stopped due to an injury in the 7th round. Naito won the Japanese flyweight title for the second time in February, 2006, and won the OPBF flyweight title in June, 2006, by 6th-round TKO. Naito made one defense of the OPBF title before returning it in February, 2007. He also announced his decision to challenge Pongsaklek Wonjongkam for the third time, but found it difficult to gather sponsors. The match was finalized on July 6; only 12 days prior to the actual match-up. Naito defeated Pongsaklek Wonjongkam on July 18, 2007 by 12-round unanimous decision, winning the WBC and lineal flyweight titles five years after his first world title shot. Wonjongkam had made 17 defenses of the world title, and had not lost in over a decade. On October 11, 2007, Naito defeated Daiki Kameda by unanimous decision for the first defense of his WBC and lineal titles. Naito thoroughly outclassed the younger fighter (Kameda is 15 years his junior) despite being fouled throughout the fight. He received illegal blows to the thighs on several occasions, and was thrown down onto the ring in a wrestling-like maneuver in the 12th round. Koki Kameda's upcoming fight was cancelled after video footage was produced showing that he encouraged his younger brother to foul Naito in-between rounds, and Daiki