Nni-form Quark Mass Matrix Expressed by the Observable Quantities

It is pointed out that the phase convention of the CKM matrix V aaects texture analysis of the quark mass matrices (M u ; M d) when we try to describe (M u ; M d) by the observable quantities (quark masses and CKM matrix parameters) only. This is demonstrated for a case of the non-Hermitian Fritzsch-type mass matrix (f M u ; f M d), which is a general expression of quark mass matrix (M u ; M d) and is described by twelve parameters. We nd that we can always choose a phase convention of V which yields f M u32 = 0, so that the remaining ten parameters in (f M u ; f M d) can completely be expressed by the ten observable quantities.