Triple Grand Slam champion Osaka said it had taken time to get used to the system but would be happy for it to be adopted at other tournaments.
"I feel like for me, it saves me the trouble of attempting to challenge or thinking about, 'Did they call it correctly or not?'" the Japanese third seed said.
"It actually gets me really focused. I don't mind it at all."
The Australian Open is the first Grand Slam to dispense with human line judges as part of efforts to reduce personnel and stage a biosecure tournament amid the Covid-19 pandemic.