Photoinduced electron-transfer processes between C-60/C-70 and 2-naphthols have been studied by nanosecond laser flash photolysis. Quantum yields (Phi(et)(T)) and rate constants (k(et)) of electron transfer from naphthols to the excited triplet states of C-60 and C-70 have been determined by observing the transient absorption bands in the wide wavelength (UV-vis/NIR regions), where the naphthoxy radicals, triplet states, and anion radicals of fullerenes appear. Both Phi(et)(T) and k(et) were increased by the addition of trimethylpyridine (Py), indicating that Py promotes the electron-donor ability of naphthols, The C-60(.-)/C-70(.-) decay with second-order kinetics in the absence of Py, suggesting charge recombination of free ion radicals, In the presence of Py, on the other hand, the initial decays of C-60(.-)/C-70(.-) obey first-order kinetics, suggesting that back electron transfer takes place within the ion radicals bridged via Py.