 Ramba uchinyora ndima iyi - Achiri muShanghai pakutanga kweHondo yePacific musi wa 8 December 1941, Izumo akabata chikepe cheAmerica chemvura uye akabatsira kunyudza chikepe cheBritain chemvura. Musi waDecember 31, ngarava yacho yakarova chimbambaira muLingayen Gulf ichitsigira mauto eJapan panguva yePhilippines Campaign.. Akaendeswa kuHong Kong muna February 1942 kuti agadziridzwe. Izumo yakaiswazve muchikamu che 1st-class cruiser musi wa 1 Chikunguru. Yakadzokera kuJapan mukupera kwa1943 uye yakashandurwa kuva ngarava yekudzidzira yeKure Naval District. 