  By designating one eigenvector of the mass matrix, one can reduce the free
parameters in the mass matrix effectively. Applying this method to the quark
mass matrix and to the lepton mass matrix, we find that this method is
consistent with available experimental data. This approach may provide some
hints for constructing theoretical models. Especially, in the lepton sector,
the Koide's mass relation is connected to the element of the tribimaximal
matrix through Foot's geometrical interpretation. In the quark sector, we
suggest another mass formula and the same procedure also applies.
