After a debut fight on May 2002, Kinshiro Usui (age 41) has now built a record of 21 wins, 4 losses, 0 draws over a 25 fight career so far. Between May 2002 and October 2008, Usui had his longest winning streak of 10 fights. In his 25 fights, his longest KO streak is 3 fights long.
An explosive pro debut saw Usui face Saithong Sriprajan in a 6 round debut fight. Kinshiro became only the 6th person to stop Sriprajan shy of the full distance, stopping him in the 2nd. Usui continued his pro journey, which was mostly successful at this point, by fighting 13 fights following his debut. Fights against boxers such as Kentaro Inamura, Jongcharoen Carryboy and Riki Shinpo followed including once in 2002, 2 times in 2003 and 10 times through 2004, 2005 and 2006.
On April 28th, 2005, Usui took on and was defeated by Masayoshi Tachiki in his first career defeat meaning his career tally went to 7-1-0. On April 28th, 2005, Usui took on and was defeated over the distance by Masayoshi Tachiki in his first career defeat. Usui lost via SD in a valiant effort. Fights against Kentaro Inamura, Nobuhisa coronita Doi, Yukio Hatano and 1 other followed where he won all 4 fights taking his winning streak to 11 wins.
Usui went into his next career fight with a record of 11-1-0 and took this to 12 wins with a win against Mike Tawatchai on September 4th, 2006. In 2006 Usui fought his next opponent Mike Tawatchai and defeated him via UD. Usui was the 3rd person to go the distance with Tawatchai. Usui then went on to win a further 8 fights taking his record to 19 wins, 2 losses and 0 draw.
Usui went into his next fight against Ryosuke Iwasa on September 5th, 2010 with a career record of 19-3-0. Being outclassed early, Usui struggled to get going in this 8 round fight and received the first stoppage defeat of his career at the hands of Iwasa. The fight went 4 rounds before ending via a TKO defeat.
On February 5th, 2011, Usui went into action again and beat Chang-hyun Son taking the winning record to 20 wins. Usui's fight against Chang-hyun Son came in the 8th round of a 8 round fight via TKO. Usui became the first person to stop Son.
On May 20th, 2011, Usui went into action again and beat Shoken Horahira taking the winning record to 21 wins. In 2011 Usui fought his next opponent in Shoken Horahira. A challenging 8 round fight that ended in Usui's favour as the judges awarded Usui the UD victory. Usui was the 4th person to defeat Horahira.
The next defeat of Usui's career came against Takafumi Nakajima on September 2nd, 2011. This took his career record to 21-4-0. A valiant effort from Usui, but one that was out of his reach technically. The fight came to a close after the final bell in a UD loss for Usui. A setback for Usui pro journey for sure.