Tuhia he tomokanga mo tenei irava - I te Hui-tanguru 1945, i angitu tetahi roopu iti o nga kaiputaiao ki te whakaputa i te iti o te rauemi i roto i te wehewehe taketake i roto i te RIKEN complex<unk>he rauemi i tohuhia e te RIKEN's cyclotron "kaore" i te uranium-235.I mutu te kaupapa wehewehe i te Maehe 1945, i te wa i whakangaromia ai te whare e noho ana i te ahi i tukuna e te USAAF "Operation Meetinghouse" ki Tokyo
He aha? Kaore i ngana ki te hanga i tetahi puranga uranium; kaore i te waatea te wai taumaha, engari ko Takeuchi Masa, ko ia te kawenga mo te wehewehe a Nishina, i tatau ko te wai marama ka nui mena ka taea te whakarei i te uranium ki te 5<unk>10% uranium-235.