Naomi Osaka's low-key celebrations for winning Australian Open 2021 involve anime, pizza, and sleep

Melbourne: Japan's Naomi Osaka said she's living her "dreams" on Saturday after defeating Jennifer Brady to win the Australian Open, adding that she'll celebrate with anime and pizza.

The 23-year-old won her fourth Grand Slam title after a comfortable 6-4, 6-3 victory in 77 minutes at Rod Laver Arena.

Osaka, who will rise to second in the world rankings, becomes only the third player after Monica Seles and Roger Federer to win their first four major finals.

Having grown up watching the Australian Open at "crazy hours" in the United States, Osaka said it felt "surreal" to triumph for the second time at Melbourne Park.

"I'm really just living my dreams," she told Channel Nine.

"I'm always shaking a little bit (at the end). Thank God I had three match points."

Reinforcing her reputation herself as tennis's leading light, having won four of her last eight Slams she's played, Osaka warned she was not satisfied.

"I take every tournament seriously," she said.

"I just want to be consistent and that is my main goal this year."

Amid an uncertain upcoming schedule, Osaka said she hoped to play the Tokyo Olympics.

"Everyone knows I wanted to play in the Olympics since I was a kid and hopefully it goes through," she said.

But after her triumph, Osaka planned a low-key celebration.

"I'm probably going to watch some anime... maybe (eat) pizza... and go to sleep," she said.