Miñoza wound up with a 288 that included rounds of 73-70 and 72 as he finished way behind the winning 271 of Katayama who fired a 67 to run away with a six-stroke victory over compatriot Hajime Meshiai who sizzled with a 64 and a 277.
In Lincolon, California, Se Ri Pak used a late flurry of birdies Saturday to shoot a one-under 71 and take a one-stroke lead over Michele Redman going into the final round of the rain-shortened tournament.
Dorothy Delasin birdied two of the seven holes to salvage an even-par 72 as the Fil-Am Rookie of the Year awardee moved to 38th place from a share of 65th in the first round. She had 147.
But compatriot Jennifer Rosales, who had a 73 in the first round, limped with a 76 on five bogeys against one birdie although she made the cut at 149.