Mezue ahịrịokwu na-esonụ: Na 1972 Summer Olympics qualification, na-eso ọdịda nke Japan iji ruo eruo maka 1972 Summer Olympics, Okano gbara arụkwaghịm na Naganuma ghọrọ onye njikwa ọzọ na 1972. O duziri asọmpi Iko Mbaụwa nke afọ 1974 na
Egwuregwu Eshia nke afọ 1974. Na 1976 Summer Olympics ntozu na Eprel 1976, mgbe ọdịda nke Japan maka iru eru maka 1976 Summer Olympics, Naganuma gbara arụkwaghịm.