Kammala jumla mai zuwa: Watanabe ya shiga cikin manyan goma na Duniya a Gasar Cin Kofin Duniya ta 1978, inda ya zama na 8. A kakar wasa ta gaba, ta lashe lambar tagulla a
1979 Duniya, ta zama mace ta farko 'yar Japan da ta lashe lambar yabo a wannan taron.