The appointment takes Perennial's Asia investment boutique team to six.
Lebourdais was previously with global fund manager Pioneer Investment Management where he spent four years working with its Japanese equities fund.
"Perennial's Japanese Equities Trust has delivered superior investment returns to our investors over five years", Perennial Investment Partners managing director Anthony Patterson said. "We are being recognised for our results and are eager for the momentum of the business to continue."
The Perennial Japanese Equities Trust has delivered a 5.3 per cent return over in the five years to September 2005.
