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In the so-called "yukawaon" model, the (effective) Yukawa coupling constants$Y_f^{eff}$ are given by vacuum expectation values (VEVs) of scalars $Y_f$(yukawaons) with $3\times 3$ components. So far, yukawaons $Y_f$ have beenassigned to ${\bf 6}$ or ${\bf 6}^*$ of U(3) family symmetry, so that quarksand leptons were not anomaly free in U(3). In this paper, yukawaons areassigned to ${\bf 8}+{\bf 1}$ of U(3), so that quarks and leptons are anomalyfree. Since VEV relations among yukawaons are also considerably changed,parameter fitting of the model is renewed. After fixing our free parameters byobserved mass ratios, we have only two and one remaining free parameters forquark and lepton mixings, respectively. We obtain successful predictions forthe quark and lepton mixing parameters including magnitudes of $CP$ violation.The effective Majorana neutrino mass is also predicted.

Yukawaon Model with Anomaly Free Set of Quarks and Leptons in a U(3) Family Symmetry