<prompt> Qedela umusho olandelayo: Ukubaluleka kuka-Ōshima kuHitler kungabonakala eqinisweni lokuthi ngemuva kokuphothulwa kwe-Anti-Comintern Pact, Inxusa lase-US eJapan, uJoseph Grew, walinganisela ukuthi lesi sivumelwano sasiwumphumela womsebenzi ka-Ōshima, ngaphandle kokubamba iqhaza koMnyango Wezangaphandle waseJapan. Ngokuphikelela kukahulumeni wamaNazi, wabuyela eBerlin njengenxusa ngoFebhuwari 1941, futhi wahlala kuleso sikhundla kwaze kwaba  <response>: ukuzinikela kwamaJalimane ngo-May 1945. Wanikela ngemizamo yakhe ekuqiniseni ubudlelwane phakathi kwamazwe amabili. Lokhu kuhlanganisa nokubambisana kwezempi endaweni yase-Indian Ocean ngendlela yempi yokulwa nemikhumbi-ngwenya yezohwebo. Inkolelo yakhe yokushisekela ubuNazi yayinamandla kangangokuthi intatheli yaseMelika uWilliam L. Shirer, encwadini ethi The Rise and Fall of the Third Reich, yabhala ukuthi u-Ōshima wayengumNazi kakhulu kunamaNazi. 