  – ▁s unk , ▁Battle ▁of ▁Philipp ine ▁Sea , ▁June ▁ 1 9 4 4 ▁▁ ▁( 1 9 4 3 )   – ▁used ▁as ▁anti - air craft ▁platform ▁and ▁s unk ▁in ▁July ▁ 1 9 4 5 ▁ ▁( 1 9 4 3 )   – ▁s unk ▁by ▁U . S . ▁sub marine ▁Red fish , ▁December ▁ 1 9 4 4 ▁ ▁( 1 9 4 4 )   – ▁s unk ▁by ▁U . S . ▁sub marine ▁Arch er fish , ▁November ▁ 1 9 4 4 ▁ ▁H ō sh ō , ▁Jun y ō , ▁K ats ur agi ▁and ▁Ry u ho ▁surv ived ▁the ▁war ▁and ▁these ▁were ▁scra pped ▁by ▁ 1 9 4 8 . ▁ ▁Never ▁completed : ▁▁▁ 4 th ▁unit ▁of ▁Un ry ū ▁class ▁( not ▁completed ); ▁s unk ▁as ▁weapon ▁test ▁target ▁and ▁scra pped ▁post war ▁▁ 5 th ▁unit ▁of ▁Un ry ū ▁class ▁( not ▁completed ); ▁dis m ant led ▁post - war ▁▁ 6 th ▁unit ▁of ▁Un ry ū ▁class ▁( not ▁completed ); ▁dis m ant led ▁post - war ▁▁ ▁– ▁heavy ▁cru iser ▁conversion ▁( not ▁completed ); ▁dis m ant led ▁post - war ▁ ▁Under ▁construction : ▁▁▁ ▁Iz um o ▁class ▁Iz um o ▁– ▁announced ▁in ▁December ▁ 2 0 1 8 ▁to ▁be ▁red es ign ated ▁and ▁converted ▁into ▁multi - pur pose ▁destroy er