A day after winning the Nobel Prize in physics, Takaaki Kajita said he felt like he was walking on air as he expressed appreciation to his mentors and colleagues who he says were instrumental in his research.

"I calmed down a bit, and now have mixed feelings as I am wondering if this really could have happened," the 56-year-old University of Tokyo professor said Wednesday. "But I'm happy, of course."

Looking back on his career as a researcher, he said he was "extremely and unusually blessed" to have had good people around him.