 Ramba uchiverenga ndima ino - Akapinda muLondon Naval Conference 1930 semukuru mukuru wehondo uye muLondon Naval Conference 1935 semutevedzeri wemukuru wehondo, sezvo simba remauto raiwedzera muhurumende panguva iyoyo raiona kuti nyanzvi yemauto emabasa yaidiwa kuperekedza vamiriri kuhurukuro dzekutonga zvombo. Yamamoto akanga ari mutsigiri akasimba wezvikepe zvengarava uye akashanda semukuru weDhipatimendi reAeronautics, asati agamuchira nzvimbo semutungamiri weFirst Carrier Division. Yamamoto akaramba kupindirwa kwakaitwa kuchamhembe kwakadziva kumabvazuva kweChina neJapan muna 1931, hondo yakatevera yenyika neChina muna 1937, uye Chibvumirano cheMatatu neNazi Germany neItaly yechiFascist muna 1940. SaMutevedzeri weGurukota reNavy, akakumbira ruregerero kuUnited States Ambassador Joseph C. Grew nokuda kwekuputika kwebhomba USS Panaymuna December 1937. Nyaya idzi dzakaita kuti atyisidzirwe kuurayiwa nemasoja airwira hondo. 