Aged 18, Osato started his career on December 2012. His record is slightly mixed currently standing at 6-1-0. Hopefully more wins will follow. Osato's longest win streak is 4 fights between December 2012 and August 2013. His longest KO streak in his 7 fights is 2 fights long.
In December 2012 Osato faced Superjames Singmanasak in his debut bout over 4 rounds, but only 1 were needed as Osato became the quickest person ever to stop Singmanasak via a 1 round KO victory. Osato went on to win his next 4 fights taking his record to 4 wins.
Ryota Yada was up next for Osato on April 14th, 2013. Osato continued with his winning streak by beating Yada. In 2013 Osato fought his next opponent Ryota Yada and defeated him via UD. Osato was the 2nd person to go the distance with Yada. 2 wins followed taking Osato's winning streak to 4 wins.
Taking the first knock of his career, Osato fought Shohei Fujimoto on September 22nd, 2013 and was defeated by Fujimoto. Fujimoto was a push too far for Osato and after a tough fight Fujimoto became the first person to beat and stop Osato in round 1.
On April 13th, 2014, Osato went into action again and beat Katsuhiko Kanno taking the winning record to 5 wins. Osato secured the win over Kanno after the final bell via UD, resulting in Osato being the 8th person to defeat Kanno.
Ken Osato went into his fight with Ryo Shirakawa on August 3rd, 2014 with 5 wins and he added another win to his record taking it to 6 wins by beating Shirakawa. Keeping his record on track, Osato showed his boxing ability in his most recent fight, taking Ryo Shirakawa the distance and securing a UD decision victory in a 6 round fight.