Yamauchi finished third in this year's Yokohama Marathon
Oxford-born athlete Mara Yamauchi says she feels "privileged" to have been selected for the 2012 Olympics.
Yamauchi has been named in Team GB's squad
alongside fellow marathon runners Paula Radcliffe and Steve Overall
The 38-year-old told BBC Oxford: "I'm really happy and relieved to have been selected at this stage. It means I can just focus on the Games now.
"It's obviously an incredible privilege to be able to compete in a home Olympics as an athlete."
She added: "I'm really excited about it but at the same time there is pressure and expectation that we wouldn't have if the Games were elsewhere.
"I've had a bit of a tough year with injuries so I was worried that I might miss out."