And with the win comes another milestone - Osaka will become the game's newest world No.1. "I've always dreamt of being in this position and I am honored to be part of the elite group of players who have reached the No.1 ranking".
In securing victory in Melbourne after her stunning win over Serena Williams in the US Open past year, Osaka also clinched the world number-one spot, the first Asian to do so.
However, the reaction to her stunning 7-6 5-7 6-4 win was not limited to those inside Rod Laver Arena, with Osaka's win sparking widespread reaction all over the world.
"The way that she had to mentally battle, to continue to come at Petra Kvitova".
It has been a rapid rise.
Osaka is trying to win a second consecutive Major trophy to go along with the one she earned at the US Open last September.
"It's insane. I can not believe I just played the final of a grand slam again", said the 28-year-old, who deservedly earned a huge ovation from the crowd.
Kvitova was full of plaudits for the new Australian Open champion but doesn't believe it's a forgone conclusion that she will dominate the sport. She slammed a ball off the court.
"She is still so young, with so much potential to keep growing as No.1. Maybe in the next tournament I play, if I see the number one next to my name, I'll feel something", she said.
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Osaka was yelling at herself.
It was hard to ignore the contrast with the scenes last time round when Osaka was being handed a Grand Slam title to a backdrop of boos from the crowd following Williams' infamous umpire rant.
"Your future is so bright, and your talent, drive, and determination will take you far". The memory of the U.S. Open is a little bit bittersweet.
Petra Kvitova really wanted to be the Australian Open champion.
Osaka has shown growing maturity on court and has proven she can handle the pressure cooker situations, but admits to being introverted off court and not a natural socialite.
"I felt like I was in a state of shock through the entire trophy presentation", she said. And with that comes all-consuming attention.
Kvitova can console herself with a career-best performance at Melbourne Park, where she did not drop a set on her way to the final.
Kvitova saved her own break point in the following game - serving wide before following up with a forehand victor. "Now this year I was in the final, so I wanted to be happy about that, yeah, just basically have no regrets about today". Sometimes, I don't know, like I feel like I don't want to waste my energy doing stuff like that. "I don't think so". Li, who claimed the women's singles titles at the 2011 French Open and the 2014 Australian Open, will be one of the inductees into the International Tennis Hall of Fame later this year. That's a very human thing to do, ' she added.
"You know how some people get worked up about things?"