The successful repair job ensures Williams will be back to a two-car operation in Japan with Alex Albon who will feature in his own car, expressing his gratitude for the team.
"I am really looking forward to Suzuka, one of my favourite tracks, and of course the amazing Japanese fans," he told the F1 website.
"Australia was clearly not how we want to go racing as a team, and it did unfortunately highlight the journey that we’re on.
"Despite this, the team trackside and back at Grove has really pulled together in an impressive way to repair the car and deliver it to the track on time, which we are all hugely thankful for."