 Ramba uchiverenga ndima iyi - Kubva muna 1953 kusvika muna 1961 Okawa akahwina menduru shanu mumitambo yevanhu vaviri, yevanhu vaviri, uye yemapoka muWorld Table Tennis Championships. Iwo menduru shanu dzeWorld Championship dzinosanganisira menduru nhatu dzegoridhe mune imwechete pa1956 World Table Tennis Championships uye mbiri mumutambo wechikwata pa1957 World Table Tennis Championships uye 1961 World Table Tennis Championships. Okawa akahwinawo zita reEnglish Open. 