  By using quark Yukawa matrices only, we can construct renormalization
invariants that are exact at the one-loop level in the standard model. One of
them $I^q$ is accidentally consistent with unity, even though quark masses are
strongly hierarchical. We calculate a lepton version of the invariant $I^l$ for
Dirac and Majorana neutrino cases and find that $I^l$ can also be close to
unity. For the Dirac neutrino and inverted hierarchy case, if the lightest
neutrino mass is 3.0 meV to 8.8 meV, an equality $I^q=I^l$ can be satisfied.
These invariants are not changed even if new particles couple to the standard
model particles, as long as those couplings are generation independent.
