Rubuta ci gaba don wannan sakin layi - A gasar wasannin Olympics ta 1972, bayan da Japan ta kasa cancanta don wasannin Olympics na 1972, Okano ya yi murabus kuma Naganuma ya sake zama manajan a 1972. Ya gudanar da gasar cin kofin duniya ta 1974 da wasannin Asiya na 1974
Ka yi haƙuri. A wasannin wasannin Olympics na 1976 a watan Afrilun 1976, bayan gazawar Japan ta cancanci shiga wasannin Olympics na 1976, Naganuma ya yi murabus.