For most American fans, the last time they saw Koji Oishi on a major MMA stage was when he, a then 28-year-old, faced Nick Diaz at UFC 53 in June 2005. Now, at 35, Oishi gets another chance at the big time when he faces Honorio Banario at One FC 9 on May 31 for the promotion’s featherweight title. A welterweight when he fought in the UFC , the now 145-pound Oishi was asked how he has changed since his fight with Diaz. “I have definitely improved a lot since then, both as a person as well as a fighter,” responded Oishi. “I am much more experienced now, so I approach each fight far more calm than I did back then. “I have also honed and refined my craft and this version of me will definitely defeat the 2005 version easily.” Coming into One FC, Oishi had won two in a row prior to drawing with Takumi Nakayama this past March in Pancrase. “I did all my best at that fight,” said Oishi. “But I am overcoming my weak points after the fight and I feel that I have really been improving, especially for this training camp, and I am sure I’ll peak at the right time.” When it comes to facing Banario, Oishi told MMAWeekly.com that the key to the fight could very well be equalizing his opponent’s physical advantages