Miyazaki, Y (reprint author), Nagoya Univ, Nagoya, Aichi, Japan.
We search for lepton flavor violating tau decays into three leptons (electron or muon) using 535 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for these decays is observed, and we set 90% confidence level upper limits on the branching fractions of (2.0-4.1) x 10(-8). These results improve upon our previously published upper limits by factors of 4.9 to 10. (C) 2008 Elsevier B.V. All rights reserved.