<prompt> Bhala ukuqhubeka kwalesi sigaba - ukubaluleka kuka-Ōshima kuHitler kungabonakala eqinisweni lokuthi ngemuva kokuphothulwa kweSivumelwano Sokulwa ne-Comintern, Inxusa lase-US eJapan, uJoseph Grew, walinganisa 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 yilapho amaJalimane ezinikela ngoMeyi 1945  <response>: . futhi. 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. 