It was the first time the Japanese star has been seen on a tennis court since withdrawing from the French Open following his press conference boycott which saw further sanctions threatened.
She did promise to speak to the media at the Olympic Games though and was pleased to have the break and felt 'refreshed' on her return.
Naomi Osaka shines in Tokyo Olympics R1
"I feel definitely a little bit refreshed and happy again," said Osaka post match.
"Playing the Olympics has been a dream of mine since I was a kid, so I feel like the break I took was very [much] needed.
"I feel like, more than anything, I'm just focused on playing tennis."
"I felt really nervous being in Japan, and playing here for the first time in maybe two years, and for it to be my first Olympics," added Osaka.
"It was definitely really nerve-wracking. But I am glad I was able to win."