Annika Sorenstam became the first player in LPGA or PGA Tour history to win a tournament five straight times with victory at the Mizuno Classic.
-21 Annika Sorenstam (Swe)
-18 Jennifer Rosales (Phi)
-16 S Gustafson (Swe), Young Kim (Kor), Y Fudoh (Jpn)
-4 Johanna Head (GB)
-3 Laura Davies (GB), Karen Stupples (GB)
The Swede started the day one shot behind leader Young Kim, but fired 64 to win by three strokes on 21 under.
Jennifer Rosales closed with a 66 to finish second on 18 under, while a 70 saw Kim slip to third alongside Sophie Gustafson and Yuri Fudoh.
England's Johanna Head finished on four under after a closing 69.
Compatriots Laura Davies and Karen Stupples were a shot further back on three under, while a 71 left Wales' Becky Morgan on two under.
Sorenstam overtook Davies' record of four wins at the Standard Register Ping tournament from 1994 to 1997.
The world number one made an eagle and six birdies as she collected her ninth title of 2005.
"This is one of the biggest things I've done in my career," said Sorenstam. "It shows a lot of consistency.
"It's tough to rate this against some of my other accomplishments because they're all so different.
"But to do something nobody has ever done is going to rank right up there.
"I felt pressure all week, but I was able to control my nerves and make some birdies when I needed to.
"To come here and do something like this is very gratifying."
The PGA Tour record for consecutive victories in an event is four, a mark shared by Gene Sarazen, Walter Hagen and Tiger Woods.