Yoshiyuki Yoshida is a Japanese mixed martial artist competing in the welterweight division. A student of former Shooto competitor Noboru Asahi, he has competed in Shooto and Cage Force - and presently the UFC. On December 1, 2007, he became the first Cage Force welterweight tournament winner.

In 2007, Yoshida was entered into a Cage Force welterweight tournament sponsored by the Worldwide Cage Network. In the opening round of the tournament, Yoshida defeated two-time interim Pancrase champion Katsuya Inoue by knockout. He went on to defeat Matt Cain in the quarterfinals and former Shooto champion Akira Kikuchi in the semi-finals of the tournament. In the finals, Yoshida defeated Dan Hardy by disqualification after being struck by a kick to the groin, becoming the first Cage Force welterweight tournament winner.

Since the tournament's closing, Yoshida has been offered a contract with the Ultimate Fighting Championship. It was originally speculated that the winners of the Cage Force tournaments were to be selected to compete in the UFC's active roster. Yoshida made his debut in the UFC at UFC 84, defeating The Ultimate Fighter 6 contestant Jon Koppenhaver by Anaconda choke submission.

He was scheduled to meet Karo Parisyan in September at UFC 88 but Parisyan pulled out of the bout only two hours before the weigh-ins citing an injury. Yoshida's last fight was against Josh Koscheck at UFC: Fight for the Troops on December 10th, 2008, a fight which he lost by 1st round knockout. UFC reported, "Tokyo's Yoshida, who remained on the canvas while being tended to by commission doctors, was removed from the Octagon on a stretcher as a precautionary measure. He was later treated and released from a local hospital for a concussion".