MOTEGI, Japan -- Danica Patrick was always sure a woman could win a race. And now the questions about her will surely stop.

Patrick made it to the place she wanted to be for so long -- Victory Lane.

She became the first female winner in IndyCar history Sunday, capturing the Indy Japan 300 in her 50th career start.

"I'm glad it finally happened," the 26-year-old driver said. "But I would be lying if I told you I didn't think it would be me."

Her owner was ecstatic, insisting more victories await. Her family could not congratulate her enough. All of which made Patrick a bit teary.

"When it actually happened, maybe it was a little anticlimactic," she said. "Then the emotions came out and that was a little girly of me."

Win No. 1 was a long time coming. Patrick finished a career-best seventh in the standings last year when her best finish was second in the race at Detroit's Belle Isle. Her first IndyCar race was in 2005 at Homestead-Miami.

"I've been asked so many times when and if I can win my first race," she said. "And, finally, no more of those questions."

Patrick was welcomed by her family near the podium.

"There was a lot of "I love you,' and 'congratulations,' Patrick said. "My dad said it was the best day of his life."

Michael Andretti, co-owner of Andretti Green Racing, called his driver a "fantastic person."

"I'm thrilled for her that the monkey is finally off of her back," said Michael Andretti, co-owner of Andretti Green Racing. "We have all believed in her and she proved today that she is a winner. Frankly, I think this is the first of many."

At the 2005 Indy 500, Patrick nearly won the pole and became the first female driver to lead the race. She wound up fourth, the best finish by a woman at Indy and a result that helped her claim rookie of the year honors.

Sunday's race, which was delayed a day because of a wet track, was won by a combination of cool composure and shrewd strategy. Patrick took the lead from pole-sitter Helio Castroneves on the 198th lap in the 200-lap race.

"When I had to talk into my radio after the race, all I could say was 'thank you,'" said Patrick, who finished 5.8594 seconds ahead of Castroneves on the 1.5-mile Twin Ring Motegi oval.