Nyorera kupfuurira kweiyi ndima - Pakazosvika Kukadzi 1945, boka diki revasayendisiti rakanga rabudirira kugadzira huwandu hushoma hwezvinhu mune yakasarudzika yekuparadzanisa muRIKEN yakaoma <unk> zvinhu izvo RIKEN's cyclotron yakaratidza kuti "kwete" uranium-235.
. Hapana kuedza kwakaitwa kuvaka murwi weuranium; mvura inorema yakanga isingawaniki, asi Takeuchi Masa, uyo akanga achitarisira mupatsanuri waNishina, akaverenga kuti mvura yakareruka yaizokwana kana uranium yaigona kupfumiswa kusvika ku5<unk>10% uranium-235.