Jenson Button claimed Honda's purchase of BAR was the "final piece of the jigsaw" in his quest to become Formula One world champion.
Honda is to buy the British-based BAR team outright and Button believes the cash injection will make the outfit a major player in F1 in 2006.
"It's the final piece of the jigsaw for me," Button, 25, told the Daily Mirror.
"I really believe we're going to be a big force next season. It's fantastic news. I can't wait."
Japanese car manufacturer Honda, which has been BAR's engine partner for the past six seasons, is to become the sole owner after British American Tobacco (BAT) agreed to the sale of its 55% stake.
Honda already has an existing 45% stake in the team which it purchased in January.
"Honda buying the team is amazing news and really shows their commitment to winning the world championship," added Button.
"This team is my best chance of winning the drivers' title and it would be fantastic if we can achieve our ambitions together."
BAR-Honda are sixth in the constructors' standings ahead of this weekend's Japanese Grand Prix, with Button ninth in the drivers' stakes.
Last month Button was confirmed as a BAR driver for the 2006 campaign after successfully negotiating his way out of a contract with Williams.
He will be joined by Brazilian Rubens Barrichello, who makes the switch from Ferrari.
BAR were founded by BAT in 1997 when they bought Tyrrell, and the team's best finish to date was second place in the 2004 constructors' championship behind Ferrari.