The driver, from Frome, Somerset, wrote: ?Happy New Year from Mr & Mrs Button!! We?re excited to see in the New year with family and loved ones.?
He and Ms Michibata, a lingerie model, have been in a relationship since 2008.
Their marriage comes after McLaren announced in December they were retaining the 2009 world champion alongside new signing Fernando Alonso for the 2015 season.
The Surrey-based team had taken weeks to decide whether to keep Button or his 2014 team-mate Kevin Magnussen, 22.
Button, who will contest his 16th season in Formula 1 this year, has won 15 races and scored 50 podiums from 268 starts.
His father, John, a former rallycross driver, died last January at his home on the French Riviera.
Source: BBC
